我想用新行替换文件中的一行(实际上我必须在该行中插入一些内容)。该行实际上包含AC_CONFIG_FILES([])我必须通过添加一些基于某些列表的 makefile 参数来将此行替换为新行。然后我构造了一个新字符串并在文件中进行了替换。有没有有效的方法来做到这一点?
# 'subdirs' is the list which contains makefile arguments
rstring = "AC_CONFIG_FILES([Makefile"
for t in subdirs:
rstring = rstring+' src/'+t+'/Makefile'
rstring += '])'
print rstring
# 'fname' is the file in which replacement have to be done
# i is used for indexing in 'insert' function
# 'rline' is the modified line
fname = 'configure.ac'
i = 0
with open(fname,'r') as f:
modlines=[]
for line in f.readlines():
if 'AC_CONFIG_FILES' in line:
modlines.insert(i,rstring+'\n')
i = i+1
continue
modlines.insert(i,line)
i = i+1
with open(fname,'w') as out:
for i in range(len(modlines)):
out.write(modlines[i])