Learn How to Quickly Create UIs in Python

3 Quick Ways To Compare Data in Python

For anyone working in an analytical role, receiving requests to compare data will be all too familiar.

We essentially need a way to load up two files, and then choose the encryption we would like to use to do the file comparison.

Code the UI

To build that UI, we can use the following code:

import PySimpleGUI as sg
layout = [
    [sg.Text('File 1'), sg.InputText(), sg.FileBrowse(),
     sg.Checkbox('MD5'), sg.Checkbox('SHA1')
     ],
    [sg.Text('File 2'), sg.InputText(), sg.FileBrowse(),
     sg.Checkbox('SHA256')
     ],
    [sg.Output(size=(88, 20))],
    [sg.Submit(), sg.Cancel()]
]
window = sg.Window('File Compare', layout)
while True:                             # The Event Loop
    event, values = window.read()
    # print(event, values) #debug
    if event in (None, 'Exit', 'Cancel'):
        break

which results in:

Simply Python UI, generated by the above code.

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Plugging in the logic

With the UI in place, it’s simple for one to see how to plug in the rest of the code. We simply need to monitor for what the user inputs and then act accordingly. We can very easily do that, with the following code.

import PySimpleGUI as sg
import re
import hashlibdef hash(fname, algo):
    if algo == 'MD5':
        hash = hashlib.md5()
    elif algo == 'SHA1':
        hash = hashlib.sha1()
    elif algo == 'SHA256':
        hash = hashlib.sha256()
    with open(fname) as handle: #opening the file one line at a time for memory considerations
        for line in handle:
            hash.update(line.encode(encoding = 'utf-8'))
    return(hash.hexdigest())layout = [
    [sg.Text('File 1'), sg.InputText(), sg.FileBrowse(),
     sg.Checkbox('MD5'), sg.Checkbox('SHA1')
     ],
    [sg.Text('File 2'), sg.InputText(), sg.FileBrowse(),
     sg.Checkbox('SHA256')
     ],
    [sg.Output(size=(88, 20))],
    [sg.Submit(), sg.Cancel()]
]window = sg.Window('File Compare', layout)while True:                             # The Event Loop
    event, values = window.read()
    # print(event, values) #debug
    if event in (None, 'Exit', 'Cancel'):
        break
    if event == 'Submit':
        file1 = file2 = isitago = None
        # print(values[0],values[3])
        if values[0] and values[3]:
            file1 = re.findall('.+:\/.+\.+.', values[0])
            file2 = re.findall('.+:\/.+\.+.', values[3])
            isitago = 1
            if not file1 and file1 is not None:
                print('Error: File 1 path not valid.')
                isitago = 0
            elif not file2 and file2 is not None:
                print('Error: File 2 path not valid.')
                isitago = 0
            elif values[1] is not True and values[2] is not True and values[4] is not True:
                print('Error: Choose at least one type of Encryption Algorithm')
            elif isitago == 1:
                print('Info: Filepaths correctly defined.')
                algos = [] #algos to compare
                if values[1] == True: algos.append('MD5')
                if values[2] == True: algos.append('SHA1')
                if values[4] == True: algos.append('SHA256')
                filepaths = [] #files
                filepaths.append(values[0])
                filepaths.append(values[3])
                print('Info: File Comparison using:', algos)
                for algo in algos:
                    print(algo, ':')
                    print(filepaths[0], ':', hash(filepaths[0], algo))
                    print(filepaths[1], ':', hash(filepaths[1], algo))
                    if hash(filepaths[0],algo) == hash(filepaths[1],algo):
                        print('Files match for ', algo)
                    else:
                        print('Files do NOT match for ', algo)
        else:
            print('Please choose 2 files.')window.close()

Running the above code will give you the following outcome:

Closing Thoughts

Although not the prettiest of UIs, this library allows you to quickly spin up simple python UIs and share them with whoever you may need to. More importantly, the code that you require to do so, is simple and very readable.

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