Hãy cho chúng tôi xem cách chúng tôi có thể thay thế giá trị cột của tệp CSV bằng Python. Tệp CSV không là gì ngoài tệp được phân cách bằng dấu phẩy Phương pháp 1. Sử dụng cách Python gốc Sử dụng phương thức replace(), chúng ta có thể dễ dàng thay thế một văn bản thành một văn bản khác. Trong đoạn mã dưới đây, hãy để chúng tôi có tệp CSV đầu vào là “csvfile. csv” và được mở ở chế độ “đọc”. Phương thức join() lấy tất cả các dòng của tệp CSV trong một lần lặp và nối chúng thành một chuỗi. Sau đó, chúng ta có thể sử dụng phương thức replace() trên toàn bộ chuỗi và có thể thực hiện thay thế một/nhiều lần. Trong toàn bộ chuỗi, văn bản đã cho được tìm kiếm và thay thế bằng văn bản đã chỉ định Thí dụ. Tệp đầu vào sẽ là Python3import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7_______28 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9____30import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
1import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
3import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
3 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
5 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
6import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7______28 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9____270import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
72import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
73import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
77import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
79import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
73import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7_______28 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9____284____32import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
86import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
73import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
7import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
91import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
93import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
73import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
95import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
9import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
0import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
99import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
2import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
01import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
03import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
04đầu ra Phương pháp 2. Sử dụng Pandas DataFrame Chúng tôi có thể đọc tệp CSV dưới dạng DataFrame và sau đó áp dụng phương thức thay thế () Python3import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
05 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
06import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
07import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
09____310import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
73import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
12import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
14import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
16______317import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
19import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
21import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
22import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
24import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
12import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
28import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
16import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
17import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
33import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
21import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
22import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
24import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
12import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
42import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
16______317import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
47import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
15import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
21import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
22import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
24import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4________ 004 ________ 005 ________ 315 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
16______008import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
8 import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
10import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
4đầu ra
Một thay thế cho câu trả lời được chấp nhận là - Sử dụng
import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
12 với import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
13 để sửa đổi tệp tại chỗ - Sử dụng
import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
14 để truy cập cột qua tiêu đề thay vì chỉ mục (Điều này chỉ hoạt động nếu CSV có tiêu đề)
CSV thử nghiệm import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
6Mã kiểm tra import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
Sự khác biệt chính là bạn không phải mở tệp đầu vào theo cách thủ công và tạo tệp đầu ra, vì import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
13 đã làm điều đó ở hậu trườngLọc tại chỗ tùy chọn. nếu đối số từ khóa import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
13 được chuyển đến import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
17 hoặc hàm tạo import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
18, tệp sẽ được chuyển đến tệp sao lưu và đầu ra tiêu chuẩn được chuyển hướng đến tệp đầu vào (nếu tệp cùng tên với tệp sao lưu đã tồn tại, nó sẽ là . Điều này giúp có thể viết một bộ lọc ghi lại tệp đầu vào của nó tại chỗ
Vòng lặp đi qua từng hàng CSV (ngoại trừ hàng tiêu đề), vì vậy bạn có thể thực hiện bất kỳ thao tác xử lý nào bạn cần trên mỗi hàng Nếu bạn vẫn muốn giữ lại bản gốc, bạn có thể chuyển vào import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
19 để import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
12 tạo bài kiểm tra. csv. tập tin sao lưuNgoài ra, lưu ý rằng với chỉnh sửa tại chỗ, "đầu ra tiêu chuẩn được chuyển hướng đến tệp đầu vào", vì vậy import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
21 in nó ra tệp thay vì dòng lệnh. Nếu bạn muốn thực sự in ra bàn điều khiển, bạn cần chỉ định import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
22 như trong import fileinput
with fileinput.input(files=('test.csv'), inplace=True, mode='r') as f:
reader = csv.DictReader(f)
print(",".join(reader.fieldnames)) # print back the headers
for row in reader:
if row["Ip"] == "127.0.0.2":
row["Sites"] = "30"
print(",".join([row["Ip"], row["Sites"]]))
23Làm cách nào để thay đổi giá trị cột trong Python?Cách cập nhật hàng và cột bằng Python Pandas . Tạo một khung dữ liệu Pandas. Trong toàn bộ hướng dẫn này, chúng tôi sẽ sử dụng một khung dữ liệu mà chúng tôi sẽ tạo ngay bây giờ. . Cập nhật cột. . Cập nhật trường hợp tên cột. . Cập nhật giá trị hàng. . Cập nhật hàng và cột dựa trên điều kiện Làm cách nào để chỉnh sửa tệp CSV hiện có bằng Python?Việc chỉnh sửa nội dung của tệp CSV hiện có sẽ yêu cầu các bước sau. đọc dữ liệu trong tệp CSV, chỉnh sửa danh sách (Cập nhật thông tin, thêm thông tin mới, xóa thông tin), sau đó ghi dữ liệu mới trở lại tệp CSV. Làm cách nào để chỉnh sửa các cột trong tệp CSV?Mở tệp CSV trong Microsoft Excel hoặc một ứng dụng tương thích, chẳng hạn như trình soạn thảo văn bản hoặc Notepad. Di chuyển con trỏ của bạn đến một dòng trống và nhập H vào cột A. Nhấn phím Tab để di chuyển đến cột tiếp theo và nhập giá trị mà bạn muốn nhập cho trường đó. Lặp lại bước b cho tất cả các trường trong hàng |