从Python CSV导入中删除空值

Question

我有我一直在努力的程序。 我有两个问题。 首先， 在导入空值之前或之后 ， 如何从数组中删除空值？ 其次， 是否有更好的方式编写此代码 。 我知道我可以使用它进行更多的面向对象编程，但是坦率地说，我现在确实让我感到困惑。

######imports python tools need for ui and csv reading 
from tkinter import *
import tkinter as tk
import csv

#####establishes arrays that the lables and scripst are saved in 
smename = []
smescript = []
rname = []
rscript = []
acname = []
acscript = []
tsname = []
tsscript = []

#####pulls infor from csv and imports to arrays
for d in csv.DictReader(open('script.csv')):
     smename.append((d['smename']))
     smescript.append((d['smescript']))
     rname.append((d['rname']))
     rscript.append((d['rscript']))
     acname.append((d['acname']))
     acscript.append((d['acscript']))
     tsname.append((d['tsname']))
     tsscript.append((d['tsscript']))

#####functions for all the option boxes to pull the needed scripts based on the button lable
def index(*entry):
     dex = smename.index(*entry)
     r = Tk()
     r.withdraw()
     r.clipboard_clear()
     r.clipboard_append(smescript[dex])
     r.update() 
     r.destroy()
     tkvar1.set('Start, Middle, & End')

def rindex(*entry):
     dex = rname.index(*entry)
     r = Tk()
     r.withdraw()
     r.clipboard_clear()
     r.clipboard_append(rscript[dex])
     r.update() 
     r.destroy()
     tkvar2.set('Remote')

def acindex(*entry):
     dex = acname.index(*entry)
     r = Tk()
     r.withdraw()
     r.clipboard_clear()
     r.clipboard_append(acscript[dex])
     r.update() 
     r.destroy()
     tkvar3.set('Abandoned Chat?')

def tsindex(*entry):
     dex = tsname.index(*entry)
     r = Tk()
     r.withdraw()
     r.clipboard_clear()
     r.clpboard_append(tsscript[dex])
     r.update() 
     r.destroy()
     tkvar4.set('Troubleshooting Steps')

#####establishes ui infromation and features    
root = tk.Tk()
root.title('HD Tools')
root.attributes("-topmost", True)
frame = tk.Frame(root)
frame.pack(pady = 5, padx = 5)

####simple option box
tkvar1 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar1, *smename, command=index)
popupMenu.configure(width=20)
popupMenu.grid(row = 1, column = 1)
tkvar1.set('Start, Middle, & End')

tkvar2 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar2, *rname, command=rindex)
popupMenu.configure(width=20)
popupMenu.grid(row = 2, column = 1)
tkvar2.set('Remote')

tkvar3 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar3, *acname, command=acindex)
popupMenu.configure(width=20)
popupMenu.grid(row = 3, column = 1)
tkvar3.set('Abandoned Chat?')

tkvar4 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar4, *tsname, command=tsindex)
popupMenu.configure(width=20)
popupMenu.grid(row = 4, column = 1)
tkvar4.set('Troubleshooting Steps')

#####runs the mainloop to start the ui =
root.mainloop()

Answer 1

您可以使用filter从list删除None和false-y值：

>>> rg = [ 'hello', None, None, 'stack', '' ]
>>> rg = list(filter(None, rg))
>>> rg
[ 'hello', 'stack' ]

---

即使不使用面向对象的编程，最简单的方法就是保持代码干燥。 这意味着，如果您发现自己一遍又一遍地使用相同的代码部分，请尝试使可重复使用的代码成为一个单独的函数。 例如，

####simple option box
tkvar1 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar1, *smename, command=index)
popupMenu.configure(width=20)
popupMenu.grid(row = 1, column = 1)
tkvar1.set('Start, Middle, & End')

tkvar2 = StringVar(root)
popupMenu = OptionMenu(frame, tkvar2, *rname, command=rindex)
popupMenu.configure(width=20)
popupMenu.grid(row = 2, column = 1)
tkvar2.set('Remote')

除了一些小差异外，这两个模块大致相同。 您可以将它们组合成一个可重用的函数：

def add_grid(data, command, title, row):
    var = StringVar(root)
    popupMenu = OptionMenu(frame, var, *data, command=command)
    popupMenu.configure(width=20)
    popupMenu.grid(row = row, column = 1)
    var.set(title)

add_grid(smename, index, 'Start, Middle, & End', 1)
add_grid(rname, rindex, 'Remote', 2)