条目小部件快把我逼疯了!:Tkinter Reddit Scraper 认为字符串条目是数字?
Entry Widget is driving me nuts!: Tkinter Reddit Scraper thinks that a string entry is numbers?
我正在做一个小项目,要创建一个 tkinter gui,它使用 api 从 reddit.com 的用户定义的 subreddit 输出前十个帖子。因为我需要让用户选择 subreddit,所以需要使用 tkinter 条目小部件输入它。但是,我遇到的问题是,当用户输入信息时,小部件不会刷新,而只是在程序启动时输出一堆数字(“.4302552760.4302552816.4367528344”)。我似乎无法让这个东西只记录用户作为字符串变量输入的内容,所以我可以 运行 通过接下来的几个 classes 并使该死的东西工作。我在这里遇到了真正的障碍,非常感谢您的帮助。
我将给出一些代码示例,整个过程,然后是具体的问题区域:
整个代码如下:
import tkinter as tk
from functools import partial
from webbrowser import open
from datetime import date
import praw
'''Initialising the Applicaiton'''
class RedditScraper(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
for F in (StartPage, redditReturn):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
'''The First Page the User will see'''
class StartPage(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label1 = tk.Label(self, text="Start Page")
label1.pack(pady=10, padx=10)
'''label2 = tk.Label(self, text="Confirm This Subreddit", command= confirmSubreddit())
label2.pack(pady=10, padx=10)'''
button1 = tk.Button(self, text="Scrape This Subreddit", command=lambda: controller.show_frame(redditReturn))
button1.pack(pady=10, padx=10)
e1 = tk.Entry(self)
e1.pack(pady=10, padx=10)
StartPage.entry1 = e1
'''Adding brackets around the user's entry to the label to suffice the praw api'''
class bracketEntry(object):
def addBrackets(self):
user_entry_plus_brackets = '"' + str(StartPage.entry1) + '"'
print(user_entry_plus_brackets)
return user_entry_plus_brackets
'''Collecting data from reddit'''
class redditCollect(object):
def getSubreddit(self):
user_agent = "Simple Subreddit Scraper"
r = praw.Reddit(user_agent=user_agent)
'''remember to add the ability to get the user-defined subreddit information'''
user_entry = bracketEntry()
user_entry_variable = user_entry.addBrackets()
posts = r.get_subreddit("pics").get_hot(limit = 10)
return posts
'''The window containing the information from Reddit for the user'''
class redditReturn(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
"""Creates all the buttons and frames for the GUI"""
get_user_entry = bracketEntry()
get_user_entry_string = get_user_entry.addBrackets()
intro = get_user_entry_string + " on Reddit: "
newFrame = tk.LabelFrame(self, text = intro)
newFrame.pack(fill="both", expand= True , anchor="nw")
row = 0
redditCollectGetter = redditCollect()
local_posts = redditCollectGetter.getSubreddit()
for p in local_posts:
gotoArticle = partial(open, p.url)
title = "(" + str(p.score) +") " + p.title
tk.Label(newFrame, text= title, pady= 10, wraplength= 700, justify= "left").grid(row= row, column= 0, sticky= "w")
tk.Button(newFrame, text= "Read more!", command= gotoArticle).grid(row= row+1, column= 0, sticky= "w")
tk.row = row + 2
app = RedditScraper()
app.mainloop()
这是我定义条目小部件的 class(如果这有帮助的话):
class StartPage(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label1 = tk.Label(self, text="Start Page")
label1.pack(pady=10, padx=10)
'''label2 = tk.Label(self, text="Confirm This Subreddit", command= confirmSubreddit())
label2.pack(pady=10, padx=10)'''
button1 = tk.Button(self, text="Scrape This Subreddit", command=lambda: controller.show_frame(redditReturn))
button1.pack(pady=10, padx=10)
e1 = tk.Entry(self)
e1.pack(pady=10, padx=10)
StartPage.entry1 = e1
这是我首先尝试操作条目以在其周围添加括号的地方,以便它可以与 reddit api:
一起使用
class bracketEntry(object):
def addBrackets(self):
user_entry_plus_brackets = '"' + str(StartPage.entry1) + '"'
print(user_entry_plus_brackets)
return user_entry_plus_brackets
我把print(user_entry_plus_brackets)放在这里是为了表明它输出的是一串数字而不是用户输入的字符串
我对 python(以及一般的编码)非常陌生,也许已经超出了我的理解范围...非常感谢任何帮助!
谢谢!
关于小部件的事情是,当您将它们强制转换为字符串时,它们 return 它们的 tkinter id。您需要做的是创建一个控制变量 (http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/control-variables.html) 并将其与您的条目相关联。
self.entry_var = tk.StringVar()
e1 = tk.Entry(self,textvariable=self.entry_var)
而不是像您那样从条目中检索值:
str(StartPage.entry1)
你得到控制变量的值是这样的:
user_entry_plus_brackets = '"' + self.entry_var.get() + '"'
我现在不在家,我可以对此进行测试,但我相信您应该能够使用它的 .get() 方法获取 Entry 的值,而无需使用控制变量:
user_entry_plus_brackets = '"' + self.entry1.get() + '"'
我正在做一个小项目,要创建一个 tkinter gui,它使用 api 从 reddit.com 的用户定义的 subreddit 输出前十个帖子。因为我需要让用户选择 subreddit,所以需要使用 tkinter 条目小部件输入它。但是,我遇到的问题是,当用户输入信息时,小部件不会刷新,而只是在程序启动时输出一堆数字(“.4302552760.4302552816.4367528344”)。我似乎无法让这个东西只记录用户作为字符串变量输入的内容,所以我可以 运行 通过接下来的几个 classes 并使该死的东西工作。我在这里遇到了真正的障碍,非常感谢您的帮助。
我将给出一些代码示例,整个过程,然后是具体的问题区域:
整个代码如下:
import tkinter as tk
from functools import partial
from webbrowser import open
from datetime import date
import praw
'''Initialising the Applicaiton'''
class RedditScraper(tk.Tk):
def __init__(self, *args, **kwargs):
tk.Tk.__init__(self, *args, **kwargs)
container = tk.Frame(self)
container.pack(side="top", fill="both", expand = True)
container.grid_rowconfigure(0, weight=1)
container.grid_columnconfigure(0, weight=1)
self.frames = {}
for F in (StartPage, redditReturn):
frame = F(container, self)
self.frames[F] = frame
frame.grid(row=0, column=0, sticky="nsew")
self.show_frame(StartPage)
def show_frame(self, cont):
frame = self.frames[cont]
frame.tkraise()
'''The First Page the User will see'''
class StartPage(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label1 = tk.Label(self, text="Start Page")
label1.pack(pady=10, padx=10)
'''label2 = tk.Label(self, text="Confirm This Subreddit", command= confirmSubreddit())
label2.pack(pady=10, padx=10)'''
button1 = tk.Button(self, text="Scrape This Subreddit", command=lambda: controller.show_frame(redditReturn))
button1.pack(pady=10, padx=10)
e1 = tk.Entry(self)
e1.pack(pady=10, padx=10)
StartPage.entry1 = e1
'''Adding brackets around the user's entry to the label to suffice the praw api'''
class bracketEntry(object):
def addBrackets(self):
user_entry_plus_brackets = '"' + str(StartPage.entry1) + '"'
print(user_entry_plus_brackets)
return user_entry_plus_brackets
'''Collecting data from reddit'''
class redditCollect(object):
def getSubreddit(self):
user_agent = "Simple Subreddit Scraper"
r = praw.Reddit(user_agent=user_agent)
'''remember to add the ability to get the user-defined subreddit information'''
user_entry = bracketEntry()
user_entry_variable = user_entry.addBrackets()
posts = r.get_subreddit("pics").get_hot(limit = 10)
return posts
'''The window containing the information from Reddit for the user'''
class redditReturn(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
"""Creates all the buttons and frames for the GUI"""
get_user_entry = bracketEntry()
get_user_entry_string = get_user_entry.addBrackets()
intro = get_user_entry_string + " on Reddit: "
newFrame = tk.LabelFrame(self, text = intro)
newFrame.pack(fill="both", expand= True , anchor="nw")
row = 0
redditCollectGetter = redditCollect()
local_posts = redditCollectGetter.getSubreddit()
for p in local_posts:
gotoArticle = partial(open, p.url)
title = "(" + str(p.score) +") " + p.title
tk.Label(newFrame, text= title, pady= 10, wraplength= 700, justify= "left").grid(row= row, column= 0, sticky= "w")
tk.Button(newFrame, text= "Read more!", command= gotoArticle).grid(row= row+1, column= 0, sticky= "w")
tk.row = row + 2
app = RedditScraper()
app.mainloop()
这是我定义条目小部件的 class(如果这有帮助的话):
class StartPage(tk.Frame, object):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
label1 = tk.Label(self, text="Start Page")
label1.pack(pady=10, padx=10)
'''label2 = tk.Label(self, text="Confirm This Subreddit", command= confirmSubreddit())
label2.pack(pady=10, padx=10)'''
button1 = tk.Button(self, text="Scrape This Subreddit", command=lambda: controller.show_frame(redditReturn))
button1.pack(pady=10, padx=10)
e1 = tk.Entry(self)
e1.pack(pady=10, padx=10)
StartPage.entry1 = e1
这是我首先尝试操作条目以在其周围添加括号的地方,以便它可以与 reddit api:
一起使用class bracketEntry(object):
def addBrackets(self):
user_entry_plus_brackets = '"' + str(StartPage.entry1) + '"'
print(user_entry_plus_brackets)
return user_entry_plus_brackets
我把print(user_entry_plus_brackets)放在这里是为了表明它输出的是一串数字而不是用户输入的字符串
我对 python(以及一般的编码)非常陌生,也许已经超出了我的理解范围...非常感谢任何帮助!
谢谢!
关于小部件的事情是,当您将它们强制转换为字符串时,它们 return 它们的 tkinter id。您需要做的是创建一个控制变量 (http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/control-variables.html) 并将其与您的条目相关联。
self.entry_var = tk.StringVar()
e1 = tk.Entry(self,textvariable=self.entry_var)
而不是像您那样从条目中检索值:
str(StartPage.entry1)
你得到控制变量的值是这样的:
user_entry_plus_brackets = '"' + self.entry_var.get() + '"'
我现在不在家,我可以对此进行测试,但我相信您应该能够使用它的 .get() 方法获取 Entry 的值,而无需使用控制变量:
user_entry_plus_brackets = '"' + self.entry1.get() + '"'