python对文件中的关键词查找替换，实现自动获取配置

Posted 2021-03-06 phyger

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+‘‘
‘
            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:UsersAdministratorDesktopdocument>D:/Python37/python.exe c:/Users/Administrator/Desktop/document/update_file.py
my_name FOUNDED!
my_age FOUNDED!

C:UsersAdministratorDesktopdocument>

update_variable.py

my_name=‘phyger‘
my_age=88

 

OK，搞定！