Question

一段时间以来，我一直在努力处理这段代码，并且正在寻求帮助。我有一个日期数组，我试图按数组顺序发出http请求，并按顺序写返回信息。

这是我的代码：

import os
import tkinter as tk
from tkinter import messagebox
import DatabaseFile as db

def selection():
    print("At %s of %d" % (select.curselection(), len(contacts)))
    return int(select.curselection()[0])

def add_contact():
    try:
        db.add_contact(name_var.get(), phone_var.get())
    except Exception as ex:
        print('Ex:', ex)
        messagebox.showwarning("Field cannot be blank", "Please enter a value in both the fields.")
    else:
        set_list()

def update_contact():
    contacts[selection()] = [name_var.get(), phone_var.get()]
    set_list()

def delete_contact():
    del contacts[selection()]
    setList()

def load_contact():
    _, name, phone = contacts[selection()]
    name_var.set(name)
    phone_var.set(phone)

def save_contact():
    fobj = open("contacts.py", "w")
    fobj.write("contactlist = [")
    for items in contacts:
        fobj.write(str(items))
        fobj.write(",")
        fobj.write("\n")
    fobj.write("]")

def exit_contact():
    result = messagebox.askokcancel(title="Contacts", message="Do you want to exit, OK or Cancel")
    if result == 1:
        exit(1)

def build_frame():
    global name_var
    global phone_var
    global select

    root = tk.Tk()
    root.title('My Contact List')

    # ---

    frame_form = tk.Frame(root)
    frame_form.pack()

    tk.Label(frame_form, text="Name:").grid(row=0, column=0, sticky='w')

    name_var = tk.StringVar()
    name = tk.Entry(frame_form, textvariable=name_var)
    name.grid(row=0, column=1, sticky='w')

    tk.Label(frame_form, text="Phone:").grid(row=1, column=0, sticky='w')

    phone_var = tk.StringVar()
    phone = tk.Entry(frame_form, textvariable=phone_var)
    phone.grid(row=1, column=1, sticky='w')

    # ---

    frame_buttons = tk.Frame(root)
    frame_buttons.pack()

    btn1 = tk.Button(frame_buttons, text=" Add  ", command=add_contact)
    btn2 = tk.Button(frame_buttons, text="Update", command=update_contact)
    btn3 = tk.Button(frame_buttons, text="Delete", command=delete_contact)
    btn4 = tk.Button(frame_buttons, text=" Load ", command=load_contact)
    btn5 = tk.Button(frame_buttons, text=" Save ", command=save_contact)
    btn6 = tk.Button(frame_buttons, text=" Exit ", command=exit_contact)
    btn1.pack(side='left') 
    btn2.pack(side='left')
    btn3.pack(side='left') 
    btn4.pack(side='left')
    btn5.pack(side='left')
    btn6.pack(side='right')

    # ---

    frame_list = tk.Frame(root)
    frame_list.pack()

    scroll = tk.Scrollbar(frame_list, orient='vertical')
    select = tk.Listbox(frame_list, yscrollcommand=scroll.set, height=7)
    scroll.config(command=select.yview)
    scroll.pack(side='right', fill='y')
    select.pack(side='left', fill='both')

    return root

def set_list() :
    global contacts

    contacts = db.read_contacts()

    select.delete(0, 'end')

    #for item in contacts:
    #    select.insert('end', item)

    select.insert('end', *contacts) # need star *  to insert all items at once

# --- main ---

contacts = [] # default value at start

# ---

db.open() # open once before program
db.create_table()

root = build_frame()

set_list()

root.mainloop()

db.close() # close after closing program

Answer 1

我设法通过使用使用承诺而不是回调的'request'版本解决了这个问题。查看代码：

async function loppThroughArray() {
    for (const date of dateArray) {
        const options = {
            url: process.env.URL + date
        };
        await asyncRequest(options, date);
        console.log('fetching: ', date);
    }
}

async function asyncRequest(options, date) {
    await rp(options)
        .then(function(html){
            const $ = cheerio.load(html);
            const content = $('.entry-content');
            const formattedContent = content.text()
            .split('\t').join('')
            .split('\n\n\n').join('')
            .split('\n\n').join('');
            const dataToBeWritten = '### ' + date + '\n' + formattedContent + '\n\n';
            fs.appendFileSync(`./WODs/${currentDate}.md`, dataToBeWritten, 'utf-8', {'flags':'a+'});
            fs.appendFileSync(`./WODs/${currentDate}.txt`, dataToBeWritten, 'utf-8', {'flags':'a+'});
        });
}

loppThroughArray();

强制同步HTTP请求的循环

1 个答案: