Python 如何从文本文件中删除空白和注释?
我想读取一个包含Python源代码的文本文件,并从中删除注释和额外的空白 file.txt(源代码文件)Python 如何从文本文件中删除空白和注释?,python,lexical-analysis,Python,Lexical Analysis,我想读取一个包含Python源代码的文本文件,并从中删除注释和额外的空白 file.txt(源代码文件) 要删除空行、尾随空格以及注释,可以使用: import re with open("file.txt", "r") as file: for line in file: line = line.rstrip() if line: if not re.match(r'\s*#', line
要删除空行、尾随空格以及注释,可以使用:
import re
with open("file.txt", "r") as file:
for line in file:
line = line.rstrip()
if line:
if not re.match(r'\s*#', line):
file.write(line)
输出
num=7
阶乘=1
你真正的问题是什么?这目前只是一个问题陈述,您需要帮助解决什么具体问题?我建议查看内置模块,当您必须逐行更改文本文件时,该模块非常有用。
with open('file.txt', 'r') as file:
lines = file.readlines()
lines = [line.replace(' ', '') for line in lines]
with open('file.txt', 'w') as file:
file.writelines(lines)
import re
with open("file.txt", "r") as file:
for line in file:
line = line.rstrip()
if line:
if not re.match(r'\s*#', line):
file.write(line)
num= 7
factorial=1
ifnum<0:
print("Sorry,factorialdoesnotexistfornegativenumbers")
elifn um==0:
print("Thefactorialof0is1")
else:
foriinrange(1,num+1):
factorial=factorial*i
print("Thefactorialof", num," is", factorial)