python 中的 IndentationError - 我的代码有什么问题？

Question

import requests
import json

url='https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY'    
headers= {'user-agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36',
"accept-language":"en-US,en;q=0.9","accept-encoding":"gzip, deflate"} 
def fetch_oi():  
r=requests.get(url,headers=headers).json()
print(r)
with open("oidata.json","w") as files:
    files.write(json.dumps(r,indent=4, sort_keys=True))

def main():
    fetch_oi()


if __name__=='__main__':
    main()

** in this code i'm getting error in r=requests.get(url,headers=headers).json() ^ IndentationError: expected an indented block

what i'm doing wronge? plzz help

Answer 1

The code in a function definition needs to be indented.

import json

url='https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY'    
headers= {'user-agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36',
"accept-language":"en-US,en;q=0.9","accept-encoding":"gzip, deflate"} 

def fetch_oi():  
    r=requests.get(url,headers=headers).json()
    print(r)
    with open("oidata.json","w") as files:
        files.write(json.dumps(r,indent=4, sort_keys=True))

def main():
    fetch_oi()


if __name__=='__main__':
    main()

Python depends heavily on correct indentation, see: https://www.w3schools.in/python-tutorial/concept-of-indentation-in-python/

Answer 2

After your def fetch_oi(): you are supposed to indent the line r=requests.get(url,headers=headers).json() since it is a function

def fetch_oi():  
    r=requests.get(url,headers=headers).json()
    print(r)

then depending on where your function ends, you should keep indenting

Answer 3

I believe it is clear that you need

def fetch_oi():  
    r=requests.get(url,headers=headers).json()
    print(r)
    with open("oidata.json","w") as files:
        files.write(json.dumps(r,indent=4, sort_keys=True))

instead of what you have (that is one tab more in fetch_io). In python you have to be careful with tabs. You need one identation level after each function. Take a look here: https://docs.python.org/2.0/ref/indentation.html

Answer 4

The body of your function fetch_oi is unindented.

import requests
import json

url='https://www.nseindia.com/api/option-chain-indices?symbol=NIFTY'    
headers= {'user-agent':'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.162 Safari/537.36', "accept-language":"en-US,en;q=0.9","accept-encoding":"gzip, deflate"} 

def fetch_oi():  
    r=requests.get(url,headers=headers).json()
    print(r)

    with open("oidata.json","w") as files:
        files.write(json.dumps(r,indent=4, sort_keys=True))

def main():
    fetch_oi()

if __name__=='__main__':
    main()

Answer 5

def fetch_oi() 之后的意图行：

Answer 6

Issue is in the body of

def fetch_oi(): 

Put space to the body

My suggestions is to use sublime IDE. So, when you select the content you can visible the content that you have used space or tab. Also using tab is the good approach rather than space

I have seen that you have used space. So adjusting and using space will make you troublesome at long run.