Choosing a File in Python with Simple Dialog

Choosing a file in Python with simple Dialog

How about using tkinter?

from Tkinter import Tk     # from tkinter import Tk for Python 3.x
from tkinter.filedialog import askopenfilename

Tk().withdraw() # we don't want a full GUI, so keep the root window from appearing
filename = askopenfilename() # show an "Open" dialog box and return the path to the selected file
print(filename)

Done!

Quick and easy file dialog in Python?

Tkinter is the easiest way if you don't want to have any other dependencies.
To show only the dialog without any other GUI elements, you have to hide the root window using the withdraw method:

import tkinter as tk
from tkinter import filedialog

root = tk.Tk()
root.withdraw()

file_path = filedialog.askopenfilename()

Python 2 variant:

import Tkinter, tkFileDialog

root = Tkinter.Tk()
root.withdraw()

file_path = tkFileDialog.askopenfilename()

How to open and select a file in Python

As mentioned in the comments, you should provide a minimal reproducible example. Since you are a new member, I am giving you this example, which can be found here. https://www.geeksforgeeks.org/loading-images-in-tkinter-using-pil/

from tkinter import *
from PIL import ImageTk, Image
from tkinter import filedialog

def open_img():
    # Select the Imagename  from a folder
    x = openfilename()

    # opens the image
    img = Image.open(x)

    # resize the image and apply a high-quality down sampling filter
    img = img.resize((250, 250), Image.ANTIALIAS)

    # PhotoImage class is used to add image to widgets, icons etc
    img = ImageTk.PhotoImage(img)

    # create a label
    panel = Label(root, image=img)

    # set the image as img
    panel.image = img
    panel.grid(row=2)

def openfilename():
    # open file dialog box to select image
    # The dialogue box has a title "Open"
    filename = filedialog.askopenfilename(title='"pen')
    return filename

# Create a window
root = Tk()

# Set Title as Image Loader
root.title("Image Loader")

# Set the resolution of window
root.geometry("550x300+300+150")

# Allow Window to be resizable
root.resizable(width=True, height=True)

# Create a button and place it into the window using grid layout
btn = Button(root, text='open image', command=open_img).grid(row=1, columnspan=4)
root.mainloop()

Choosing a file in Python3

You're looking for tkinter.filedialog as noted in the docs.

from tkinter import filedialog

You can look at what methods/classes are in filedialog by running help(filedialog) in the python interpreter. I think filedialog.LoadFileDialog is what you're looking for.

How to choose multiple files from file dialog and open at the same time and access them

You have to use the QFileDialog::getOpenFileNames() method, also the second value of the tuple that returns is not a check but a string that indicates the filter used, if you want to verify then you have to use the size of the filenames:

filenames, _ = QFileDialog.getOpenFileNames(
    None,
    "QFileDialog.getOpenFileNames()",
    "",
    "All Files (*);;Python Files (*.py);;Text Files (*.txt)",
)
if filenames:
    for filename in filenames:
        print(filename)

How to prompt user to open a file with python3? (pygame)

Pygame is a low-level library, so it doesn't have the kind of built-in dialogs you're after. You can create such, but it will be quicker to use the tkinter module which is distributed with Python and provides an interface to the TK GUI libraries. I'd recommend reading the documentation, but here's a function that will pop up a file selection dialog and then return the path selected:

def prompt_file():
    """Create a Tk file dialog and cleanup when finished"""
    top = tkinter.Tk()
    top.withdraw()  # hide window
    file_name = tkinter.filedialog.askopenfilename(parent=top)
    top.destroy()
    return file_name

Here's a small example incorporating this function, pressing Spacebar will popup the dialog:

import tkinter
import tkinter.filedialog
import pygame

WIDTH = 640
HEIGHT = 480
FPS = 30

def prompt_file():
    """Create a Tk file dialog and cleanup when finished"""
    top = tkinter.Tk()
    top.withdraw()  # hide window
    file_name = tkinter.filedialog.askopenfilename(parent=top)
    top.destroy()
    return file_name

pygame.init()
window = pygame.display.set_mode((WIDTH, HEIGHT))
clock = pygame.time.Clock()

f = "<No File Selected>"
frames = 0
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYUP:
            if event.key == pygame.K_SPACE:
                f = prompt_file()

    # draw surface - fill background
    window.fill(pygame.color.Color("grey"))
    ## update title to show filename
    pygame.display.set_caption(f"Frames: {frames:10}, File: {f}")
    # show surface
    pygame.display.update()
    # limit frames
    clock.tick(FPS)
    frames += 1
pygame.quit()

Notes: This will pause your game loop, as indicated by the frame counter but as events are being handled by the window manager, this shouldn't be an issue.
I'm not sure why I needed the explicit import tkinter.filedialog, but I get an AttributeError if I don't.

As for string entry in pygame, you might want to do this natively, in which case you'd be handling KEYUP events for letter keys to build the string and perhaps finishing when the user presses Enter or your own drawn button. You could continue down the tk path, in which case you'll want to use something like tkinter.simpledialog.askstring(…)

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