尝试遍历JSON中的数据

Question

I have a REST API for all police reports coming in, and I'm trying to iterate through the result of the GET request.

import requests
import json
import time

query = "http://gismaps.wichita.gov/agsweb/rest/services/COWGIS/WPD_Public/MapServer/0/query?where=1%3D1&outFields=CATEGORY,ADDRESS,PBADDRESS,CASEADDRESS,CITY,STARTDATE,DOW,INCMONTH,MONTHHS,OFFENSE_CO,OFFENSE_DE,PLACE_DESC,CLASS_TYPE,Shape,INCREPORT,STARTDATET,STARTTIME&outSR=4326&f=json"
query_value = requests.get(query)
crime = query_value.json()

def search(num):
    for i in range(1, num):
        print(crime["features"][i]["attributes"]["CATEGORY"])


search(10)

This code returns this data:

AGG_ASSAULT DISORDERLY VANDALISM DISORDERLY DRUGS DRUGS OTHERTRAF_VIO OTHERTRAF_VIO LARCENY

But when I run this code:

import requests
import json
import time

query = "http://gismaps.wichita.gov/agsweb/rest/services/COWGIS/WPD_Public/MapServer/0/query?where=1%3D1&outFields=CATEGORY,ADDRESS,PBADDRESS,CASEADDRESS,CITY,STARTDATE,DOW,INCMONTH,MONTHHS,OFFENSE_CO,OFFENSE_DE,PLACE_DESC,CLASS_TYPE,Shape,INCREPORT,STARTDATET,STARTTIME&outSR=4326&f=json"
query_value = requests.get(query)
crime = query_value.json()

def search(num):
    amt = 0
    for i in range(1, num):
        #print(crime["features"][i]["attributes"]["CATEGORY"])
        value = crime["features"][i]["attributes"]["CATEGORY"]
        print(str(value))
        if str(value) == "DRUGS":
            amt + 1
    print(amt, "matches")


search(10)

It returns "0 matches", even though it clearly outputs that there are 2 reports that have a value of "DRUGS", and it's returning me 0. Any help would be appreciated

Answer 1

The line amt + 1 doesn't do much. To increment the counter, use amt += 1 .