删除*.py文件中的注释

s=''
for l in open('file1.py').readlines():
    if '#'in l:
        l=l.split('#')[0]+'\n'
    s+=l
f = open('file1.py','w')
f.write(s)
f.close()

f = open('file1.py', 'r+')
line = f.readlines()
f.seek(0)
for l in line:
    for i in range(len(l)):
        if l[i]=='#':
            l=l[:i]+' '*(len(l)-i-1)+'\n'
            break
    f.write(l)
f.close()