Python：str.startswith（）和字符串比较“ ==”无法正常工作

Question

I'm trying to read a string from a file and find words that start with "'param." This is my code:

# -*- coding: utf-8 -*-

inputfile = open('abc.json', 'r')

fieldnametemp = []

for line in inputfile:
    for word in line.split():
        if(word == "'fieldname':"):
            fieldnametemp.append(line.split(':')[1])

for element in fieldnametemp:
    print element
    if(element.startswith("'param.")):
        print 1
    else:
        print 0

And this is my output:

     'param.design_key',

    0
     'param.abc',

    0
     'param.def',

    0

Even if its start with "'param." it prints 0.

I also tried to use

if(element.split('.')[0] == "'param."): 

instead of

if(element.startswith("'param.")): 

but output is same. What's wrong and what can I do?

Answer 1

Based on this

for word in line.split():
        if(word == "'fieldname':"):
            fieldnametemp.append(line.split(':')[1])

every element in fieldnametemp starts with a whitespace. So the content of element when you do element.startswith("'param.") also starts with a whitespace, so you are actually doing:

 " 'param.abc'".startswith("'.param")

which is obviously false. you need to include the whitespace:

element.startswith(" 'param.")