Question

所以基本上我正在用python编写程序，我需要的子例程之一是没有重复的昵称，所以我所做的就是将所有昵称添加到txt文件中，然后我要读取文件并确保昵称与文件中的昵称不同。这是代码：

sAskNick = input ("What nickname would you like to proceed with?: ")

nicknames = open("nicknames.txt","a+")
aAllNicks = []

with open ("nicknames.txt") as f:
aAllNicks = f.read().splitlines()

for i in range(0,4):
    while sAskNick == aAllNicks[i]:
        print("Nickname used/inappropriate")

    else:
        print("Valid nickname")
        break

在此nicknames.txt仅在每行中包含一个昵称列表，文件中包含5个昵称。

Answer 1

如果要在给定昵称存在于该文件中时执行某些操作：

given_nickname = input('What is your nickname?')

#Read the file:
nicknames = open(r'c:\filelocation','r').read().splitlines()

for element in range(len(nicknames)):
    if given_nickname in nicknames:
        print('{0} is in the nicknames list'.format(given_nickname))
    else:
        print('{0} is NOT in the list'.format(given_nickname))

如果您想在每次输入一些昵称时都编辑文本文件，则可以使用以下命令进行编辑。 注意： 当然，如果您使用纯文本文件在每行中保留每个昵称，这种情况将起作用：

#Read the file:
file_location = r'somepath'
read_file = open(file_location,'r').read().splitlines()
nicknames = list(read_file) #catch the file as a list, its an optional line for cleaner code

def edit_file(nickname,file_location):
    f = open(file_location,'a').write('\n{0}'.format(nickname)) # before adding each nickname,start a new line in the text file



while True:
    given_nickname = input('What is your nickname?')
    if given_nickname not in nicknames:
        print('Welcome {0}!'.format(given_nickname))
        edit_file(nickname = given_nickname,file_location = file_location)
        break # stop the execution

    else:
        print('Error! {0} already chosen!'.format(given_nickname))
        #looping over the while loop if nickname is taken

您可以在此问题上实现许多目标。我相信这两个可以完成。

检查昵称时如何检查数组中的每个元素

1 个答案: