组合框在 Tkinter 中输入 csv 文件中的空字段

Question

enter code here 
import tkinter as tk
import tkinter.ttk as ttk
import csv

class Application(tk.Frame):
def __init__(self, root):
    self.root = root
    self.initialize_user_interface()

def initialize_user_interface(self):
     self.button2 = tk.Button(self.root, text="Summary", command=self.summary_data)
    self.button2.grid(row=0, column=1)


def summary_data(self):
  n = tk.StringVar(value="choose location")
  summarychoosen = ttk.Combobox(self.root, width = 20, textvariable = n);
  summarychoosen.grid(row=1, column=1, sticky="wesn")
  with open('UI_LLD.csv') as f:
    reader = csv.DictReader(f, delimiter=',')
    for row in reader:
        aSummary = row['Summary']
        print(aSummary)
        summarychoosen['values'] = [row['Summary']for row in reader] 

app = Application(tk.Tk())
app.root.mainloop()

问题：

Combox 也占用空单元格。在我的应用程序中，我只需要将验证字符串作为组合框列表
在列表中，第一个条目是不可见的

enter image description here

Answer 1

仔细看for循环：

for row in reader:
    aSummary = row['Summary'] # read the first line
    print(aSummary)
    # read the remaining lines
    summarychoosen['values'] = [row['Summary']for row in reader]

因此选择列表中缺少第一个条目。

其实你可以去掉for循环，但只保留for循环的最后一行：

with open('UI_LLD.csv') as f:
    reader = csv.DictReader(f, delimiter=',')
    # added "if" to filter out empty lines
    summarychoosen['values'] = [row['Summary'] for row in reader if row['Summary'].strip()]

组合框在 Tkinter 中输入 csv 文件中的空字段

combobox enter the empty field from csv file in Tkinter

csv

combobox

tkinter

python-3.x

tkinter-canvas