a script to walk a dir, and filter each line of the files in that dir, and do something if the line fulfills some criteria

dir_walk.py

# a script to walk a dir, and filter each line of the files in that dir, and do something if the line fulfills some criteria 
import os
import os.path 
script_dir = r"<script-dir>"
dir_to_walk = r"<dir-to-walk>"
os.getcwd()
os.chdir(script_dir)
os.getcwd()
classes_file_name = os.path.join(script_dir, "<somefile.txt>" )
with open(classes_file_name) as file:
    content = file.read()

#print(content)
classes = content.split("\n")
classes = [cls.strip() for cls in classes] # remove leading/trailing white spaces
#print(len(classes))

def line_with_words(line, words):
    for word in words:
        if line.find(word) >= 0 :
            return True
    return False


def handle_dir(adir):
    print("handling dir",adir)
    files = os.listdir(adir)
    java_files = [file for file in files if file.endswith(".java")]
    folders = [folder for folder in files if os.path.isdir(os.path.join(adir,folder))]

    for java_file in java_files:
        full_path = os.path.join(adir, java_file)
        with open(full_path,"rb") as file:
            content = file.read()
        print("handling file", java_file) 
        lines = content.splitlines()
        #print("lines",lines)

        with open(full_path,mode="wb") as file:
            for line in lines:
                #print("line:",line)
                linestr = line.decode("utf-8")
                if line_with_words(linestr, classes) and line_with_words(linestr,["get","set"]) and line_with_words(linestr,["public"]):
                    line += b"henrychange" 
                file.write(line)
                file.write(b"\n") 

    #recursive call 
    for folder in folders:
        handle_dir(os.path.join(adir,folder) ) 
    
    #break #temp process one file only

handle_dir(dir_to_walk)
print("done.")