python对文件中的关键词查找替换，实现自动获取配置

1、目的

想对update_variable.py文件中的配置进行修改，数据通过系统接口自动获取

update_variable.py

my_name='null'
my_age=18

2、代码

update_file.py

# name=phyger
# line='my name: {name}'
# new=line.replace('{name}',name)
# print(new)
# cur_abspath=os.path.abspath(__file__)


import os


cur_path=os.path.dirname(__file__)
def change_words(old_str,new_str):
file_data=''
with open(cur_path+'\\update_variable.py',mode='r+') as f:
for line in f:
if old_str in line:
if isinstance(new_str,int):
print(old_str+' FOUNDED!')
line=old_str+'=%d'%(new_str)
else:
print(old_str+' FOUNDED!')
line=old_str+'='+'\''+new_str+'\'\n'
file_data+=line
f.close()

with open(cur_path+'\\update_variable.py',mode='w') as f:
f.write(file_data)
f.close()

def change_name(new_name):
change_words('my_name',new_name)

def change_age(new_age):
change_words('my_age',new_age)


if __name__ == "__main__":
new_name='phyger'
change_name(new_name)
new_age=88
change_age(new_age)

3、运行后结果

C:\Users\Administrator\Desktop\document>D:/Python37/python.exe c:/Users/Administrator/Desktop/document/update_file.py
my_name FOUNDED!
my_age FOUNDED!

C:\Users\Administrator\Desktop\document>

update_variable.py

my_name='phyger'
my_age=88

OK，搞定！

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