Python 如何在函数中定义变量并返回数据?
我正在尝试创建一个程序,在该程序中,我从和API接收新冠病毒-19患者的数量,并使用这些数据 这是我的代码:Python 如何在函数中定义变量并返回数据?,python,python-3.x,Python,Python 3.x,我正在尝试创建一个程序,在该程序中,我从和API接收新冠病毒-19患者的数量,并使用这些数据 这是我的代码: import requests from datetime import date from datetime import timedelta date = str(date.today() - timedelta(days=1)) country = 'india' def search(date, country):
import requests
from datetime import date
from datetime import timedelta
date = str(date.today() - timedelta(days=1))
country = 'india'
def search(date, country):
print("Showing Data For :", date)
url = "https://covid-19-data.p.rapidapi.com/report/country/name"
querystring = {"date-format":"undefined","format":"undefined","date":date,"name":country}
headers = {
'x-rapidapi-host': "covid-19-data.p.rapidapi.com",
'x-rapidapi-key': "286798d6demshcf160ec64afce22p11662bjsn40bdced08453"
}
response = requests.request("GET", url, headers=headers, params=querystring).json()
data = response[0]
data = data["provinces"]
data = data[0]
return data
search(date, country)
print("Total Cases In India :", data['confirmed'])
每当我执行代码时,我都会得到一个错误
这是错误:名称错误:未定义名称“数据”您没有使用返回值
import requests
from datetime import date
from datetime import timedelta
date = str(date.today() - timedelta(days=1))
country = 'india'
def search(date, country):
print("Showing Data For :", date)
url = "https://covid-19-data.p.rapidapi.com/report/country/name"
querystring = {"date-format": "undefined", "format": "undefined", "date": date, "name": country}
headers = {
'x-rapidapi-host': "covid-19-data.p.rapidapi.com",
'x-rapidapi-key': "286798d6demshcf160ec64afce22p11662bjsn40bdced08453"
}
response = requests.request("GET", url, headers=headers, params=querystring).json()
data = response[0]
data = data["provinces"]
data = data[0]
#THIS DATA VARIABLE DOES NOT EXIST OUTSITE OF THE FUNCTION
return data
# HERE YOU NEED TO ASSIGN THE RETURN VARIABLE TO THE DATA VARIABLE
data = search(date, country)
print("Total Cases In India :", data['confirmed'])
您没有使用返回值
import requests
from datetime import date
from datetime import timedelta
date = str(date.today() - timedelta(days=1))
country = 'india'
def search(date, country):
print("Showing Data For :", date)
url = "https://covid-19-data.p.rapidapi.com/report/country/name"
querystring = {"date-format": "undefined", "format": "undefined", "date": date, "name": country}
headers = {
'x-rapidapi-host': "covid-19-data.p.rapidapi.com",
'x-rapidapi-key': "286798d6demshcf160ec64afce22p11662bjsn40bdced08453"
}
response = requests.request("GET", url, headers=headers, params=querystring).json()
data = response[0]
data = data["provinces"]
data = data[0]
#THIS DATA VARIABLE DOES NOT EXIST OUTSITE OF THE FUNCTION
return data
# HERE YOU NEED TO ASSIGN THE RETURN VARIABLE TO THE DATA VARIABLE
data = search(date, country)
print("Total Cases In India :", data['confirmed'])
这在函数外部,变量数据在函数范围内定义,因此在函数外部不可见。您应该调用函数并将其存储在变量中。然后在打印中使用它,就像@Nivardo在上面的答案中所做的那样
这在函数外部,变量数据在函数范围内定义,因此在函数外部不可见。您应该调用函数并将其存储在变量中。然后在打印中使用它,就像@Nivardo在上面的答案中所做的那样 您没有捕获函数的返回值。您没有捕获函数的返回值。