将列表转换为包含双引号并用逗号分隔的单个字符串

Question

I have met a problem to convert a list: list=['1','2','3'] into ' "1","2","3" ' .

My code is:

str(",".join('"{}"'.format(i) for i in list))

but my output is: "1","2","3" instead of ' "1","2","3" '

May I have your suggestion? Thanks.

Answer 1

I see you don't want to just prepend/append the needed substrings( the single quote and white space ) to the crucial string.
Here's a trick with str.replace() function:

lst = ['1','2','3']
result = "' - '".replace('-', ",".join('"{}"'.format(i) for i in lst))

print(result)

The output:

' "1","2","3" '

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• "' - '" - acts as a placeholder

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Or the same with additional str.format() function call:

result = "' {} '".format(",".join('"{}"'.format(i) for i in lst))

Answer 2

list = ['1','2','3', '5']
result = "' - '".replace('-', ",".join('"{}"'.format(i) for i in list)) 
# "' - '" - acts as a placeholder
print(result) # ' "1","2","3","5" '