[英]Python - Remove quotes and double minus using replace
給定一個字符串,例如
--"I like salami. "-I want to walk to the shops"
我如何返回諸如
I like salami. I want to walk to the shops.
我可以單獨更改每個參數,但是當我使用“-”符號時會失敗。
行情
b = '"'
for char in b:
solution = MyString.replace(char,"")
#output --I like salami. -I want to walk to the shops
減去
b = '-'
for char in b:
solution = MyString.replace(char,"")
#output "I like salami. "I want to walk to the shops"
一起
MyString = '--"I like salami. "-I want to walk to the shops"'
b = '"-'
for char in b:
print(MyString.replace(char,""))
#output "I like salami. "I want to walk to the shops"
像這樣做:
MyString = '--"I like salami. "-I want to walk to the shops"'
MyString = MyString.replace('"',"")
MyString = MyString.replace('-',"")
print MyString
#output: I like salami. I want to walk to the shops
或者,您可以使用正則表達式來執行以下操作:
import re
MyString = '--"I like salami. "-I want to walk to the shops"'
MyString = re.sub('["-]', '', MyString)
print MyString
#output: I like salami. I want to walk to the shops
如果尚不存在,請記住安裝re 。 告訴我是否有問題。
Python string.replace
不執行就地替換,而是返回一個包含替換的新字符串。 由於您沒有使用第一次替換的返回值,因此將其丟棄,並且循環的第二次迭代使用字符-
僅替換此字符而不是原始字符串中的"
。要達到預期的效果,可以使用以下命令片段:
MyString = '--"I like salami. "-I want to walk to the shops"'
b = '"-'
for char in b:
MyString = MyString.replace(char,"")
print(MyString)
#Outputs: I like salami. I want to walk to the shops
.replace(oldstr, newstr)
方法將為您提供幫助,它很簡單並且可以通過菊花鏈鏈接。 所以...
MyString = MyString.replace('"', '').replace('-', '')
請注意, .replace()
方法僅一次替換子字符串。 它不能做單個字符。 為此,您可以使用正則表達式來執行此操作,但這更加復雜。 可以使用import re
訪問該模塊。 您可以使用:
MyString = re.sub('["-]', '', MyString)
另外,在旁注中...報價可能很棘手。 但是,您可以通過四種不同的方式來引用某項內容:用一對單引號,一對雙引號或一對三重單引號或三重雙引號。 因此,以下所有都是Python中的字符串:
'hello'
"Don't you think" # string with an apostrophe is easily in double quotes
'''that this is a really really..'''
"""long quote? Hey!
this quote is actually more than one line long!"""
In [1]: MyString = '--"I like salami. "-I want to walk to the shops"'
In [2]: MyString.replace('-', '').replace('"', '')
Out[2]: 'I like salami. I want to walk to the shops'
這是使用美麗的lambda函數的幾種方法:
word='--"I like salami. "-I want to walk to the shops"'
print("".join(list(map(lambda x:x if x!='-' and x!='"' else '',word))))
輸出:
I like salami. I want to walk to the shops
使用正則表達式的另一種解決方案:
import re
str = '--"I like salami. "-I want to walk to the shops"'
print re.sub("[-\"]", repl="", string=str)
輸出:
I like salami. I want to walk to the shops
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