Application to display and search local memos (diary) in Python

I've been away from programming for a long time, but my desire to make something has reached its limit It doesn't make much sense to make it yourself It was going to be a good rehabilitation practice, so I started making it.

The things (planned) that we are planning to realize are as follows. -A list of files under a certain directory can be displayed (the contents can also be displayed). -Keyword (regular expression) search is possible -Display the result on GUI (Can I display it on a WEB browser?)

I haven't done the GUI part at all yet, but I was able to search. The composition is like this so far.

Implemented as follows. I'm new to it, so there are likely to be many better implementations.

AxMemoBrowser.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
Created on 2014/11/26

@author: kuromame
'''
from PyCMemo import PyCMemo

#cmemo = PyCMemo("/Users/kuromame/Desktop");
cmemo = PyCMemo();

#cmemo.ReadDir();
cmemo.SearchString("variable");

PyCMemo.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
Created on 2014/11/26

@author: kuromame
'''

#Import required modules
import os;
import sys;
import re;
import codecs;


class PyCMemo:
    def __init__(self,root_dir=''):
        #Initialization of class members
        print('[PyCMemo.__init__]');
        self.pwd = '';                  #Root directory when searching
        self.file_list = [];            #List of searched files
        self.pattern = [];              #Search word(Regular expression possible)．リスト形式で最後尾が最新のSearch word．
        self.isRead = 0;                #Flag for confirming whether you have searched even once
        #Specify the current directory or the specified directory
        if root_dir != '':              
            self.pwd = root_dir;
        else:
            self.pwd = '';                  

    def ReadDir(self):
        #Variable initialization
        print('[PyCMemo.ReadDir]');
        if self.pwd == '':
            self.pwd = os.path.abspath(os.path.dirname(__file__));
        print(self.pwd);
        #Search under the current directory.
        #Search from the top down.
        for root, dirs, files in os.walk(self.pwd):
            for file_ in files:
                full_path = os.path.join(root, file_);
                self.file_list.append(full_path);
                print(full_path);
        #Sort search results
        self.file_list.sort();
        #print(self.file_list);
                
    def SearchString(self,pattern):
        #Variable initialization
        print('[PyCMemo.SearchString]');
        self.pattern.append(pattern);
        #Regular expression search engine initialization
        ptn = re.compile(self.pattern[-1]);
        #Call ReadDir if the file has never been read
        if self.isRead == 0: self.ReadDir(),
        self.isRead = 1;
        #Recursively search for files
        for fname in self.file_list:
            print('=Start search=');
            print(fname);
            try:
                fp = codecs.open(fname,'r','utf-8');
                line_num = 1;
                try:
                    for line in fp.readlines():
                        if ptn.search(line): print(fname,line_num,line),
                        line_num += 1;
                        #print(fname,line_num);
                except UnicodeDecodeError:
                    print("Could not search due to an encoding error.")
                finally:
                    #Do nothing unexpectedly.(Originally, it is necessary to devise such as throwing an exception)
                    pass
            finally:
                fp.close();
                print('=Search end=')
    
                    

By the way, from this time on, I started to put the code on GitHub in practice. https://github.com/ambitious-kuromame/AxMemoBrowser