When we are reading other’s source codes, such as you are reading a wordpress theme codes, we have to find a file which contains a text string or function from many source code files. It is a boring thing. Is there any easy way to find these files that contains a text string. The answer is yes.
In this tutorial, we will introduce how to find these files by python script.
1.Set a directory and traverse all files with a file extension
For example, we want to find all php files that contain a text string ‘acmephoto_action_feature_slider‘, first, we will list all php files in a directory.
import os dir = r'E:\xampp\htdocs\www.pickdemo.com\wp-content\themes\acmephoto' phpfiles = traverseDir(dir, file_type = '.php')
traverseDir() function is to list all files with a file extension. You can find this function in this tutorial.
2.Read all files line by line and check whether contain a text string or not
After list all files in a directory, we will read these files line by line, then we check each line contains a text string(acmephoto_action_feature_slider) or not, if a line of a file contains, we will return it.
Here we create a function to check a file contains a text string or not
from unidecode import unidecode def fileContain(file, text): with open(file, 'rb') as fin: # read file for line in fin: content = line.decode("utf-8") content= unidecode(content) if text in content: return True return False
Then we will check all php files.
for f in phpfiles: flag = fileContain(f, text = 'acmephoto_action_feature_slider') if flag: print(f)
Run this code, we will get result like:
Which means we find two files in this directory.