Python 使用 len 作为文本但丢弃计数中的空格
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Using len for text but discarding spaces in the count
提问by Izento
So, I am trying to create a program which counts the number of characters in a string which the user inputs, but I want to discard any spaces that the user enters.
因此，我正在尝试创建一个程序来计算用户输入的字符串中的字符数，但我想丢弃用户输入的任何空格。
def main():
full_name = str(input("Please enter in a full name: ")).split(" ")
for x in full_name:
print(len(x))
main()
Using this, I can get the number of the characters in each word, without spaces, but I don't know how to add each number together and print the total.
使用这个，我可以获得每个单词中的字符数，没有空格，但我不知道如何将每个数字加在一起并打印总数。
采纳答案by inspectorG4dget
Count the length and subtract the number of spaces:
计算长度并减去空格数：
>>> full_name = input("Please enter in a full name: ")
Please enter in a full name: john smith
>>> len(full_name) - full_name.count(' ')
9
>>> len(full_name)
回答by Ashwini Chaudhary
Use sumwith a generator expression:
使用sum与发电机的表达：
>>> text = 'foo bar spam'
>>> sum(len(x) for x in text.split())
10
Or str.translatewith len:
或str.translate与len：
>>> from string import whitespace
>>> len(text.translate(None, whitespace)) #Handles all types of whitespace characters
10
回答by Ashwini Chaudhary
Why can't you just do:
你为什么不能这样做：
>>> mystr = input("Please enter in a full name: ")
Please enter in a full name: iCodez wrote this
>>> len(mystr.replace(" ", ""))
15
>>> len(mystr)
17
>>>
This gets the length of the string minus the spaces.
这将获得字符串的长度减去空格。
回答by oleg
I can propose a few versions.
我可以提出几个版本。
You can replace each space with an empty string and calculate the length:
您可以用空字符串替换每个空格并计算长度：
len(mystr.replace(" ", ""))
You can calculate the length of the whole string and subtract the number of spaces:
您可以计算整个字符串的长度并减去空格数：
len(mystr) - mystr.count(' ')
Or you can sum the lengths of all substrings after splitting the string with spaces:
或者您可以在用空格分割字符串后对所有子字符串的长度求和：
sum(map(len, mystr.split(' ')))
回答by rlms
Some code as close as possible to your original:
一些尽可能接近原始代码的代码：
def main():
full_name = input("Please enter in a full name: ").split()
total = 0
for x in full_name:
total += len(x)
print(total)
However, I think len(full_name) - full_name.count(' ')is better.
不过，我觉得len(full_name) - full_name.count(' ')还好。
回答by Laurent LAPORTE
To count the number of characters excluding spaces, you can simply do:
要计算不包括空格的字符数，您可以简单地执行以下操作：
>>> full_name = "John DOE"
>>> len(full_name) - full_name.count(' ')
7
回答by Matteo Italia
You can also do
你也可以这样做
sum(1 for c in s if c!=' ')
Which avoids any unnecessary temporary string or list.
这避免了任何不必要的临时字符串或列表。
