我试图编写一个函数来验证包含两个日期(开始和结束)、目的地和价格的包。
最初,我尝试编写一个函数“创建”日期,并将它们放在列表中,然后比较它们以确定结束日期是否低于开始日期,但我认为这太复杂了,所以我求助于datetime内置模块。
但是,当我尝试运行测试函数时,它会失败,并输出此错误消息。
File "C:\Users\Anon\Desktop\Fac\FP\pythonProject\main.py", line 65, in valideaza_pachet
raise Exception(err)
Exception: wrong dates!我想我一定是在valideaza_pachet()函数中搞砸了一个条件,但我不明白我做错了什么
守则:
import time
import calendar
from datetime import date, datetime
def creeaza_pachet(data_i, data_s, dest, pret):
# function that creates a tourism package, data_i = beginning date, data_s = end date, dest = destination and pret = price
return {
"data_i": data_i,
"data_s": data_s,
"dest": dest,
"pret": pret
}
def get_data_i(pachet):
# functie that returns the beginning date of the package
return pachet["data_i"]
def get_data_s(pachet):
# functie that returns the end date of the package
return pachet["data_s"]
def get_destinatie(pachet):
# functie that returns the destination of the package
return pachet["dest"]
def get_pret(pachet):
# functie that returns the price of the package
# input: pachet - un pachet
# output: pretul float > 0 al pachetului
return pachet["pret"]
def valideaza_pachet(pachet):
#functie that validates if a package was correctly introduced or not
#it raises an Exception as ex if any of the conditions aren't met
err = ""
if get_data_i(pachet) < get_data_s(pachet):
err += "wrong dates!" # if the end date is lower than the beginning date
if get_destinatie(pachet) == " ":
err += "wrong destination!"
if get_pret(pachet) <= 0:
err += "wrong price!"
if len(err) > 0:
raise Exception(err)
def test_valideaza_pachet():
pachet = creeaza_pachet(datetime.strptime('24/08/2021',"%d/%m/%Y"), datetime.strptime('26/08/2021',"%d/%m/%Y"), "Galati", 9000.1)
valideaza_pachet(pachet)
pachet_gresit = creeaza_pachet(datetime.strptime('24/08/2021',"%d/%m/%Y"), datetime.strptime('22/08/2021',"%d/%m/%Y"), "Galati", 9000.1)
try:
valideaza_pachet(pachet_gresit)
assert False
except Exception as ex:
assert (str(ex) == "wrong dates!\n")
alt_pachet = creeaza_pachet(datetime.strptime('24/08/2021',"%d/%m/%Y"), datetime.strptime('22/08/2021',"%d/%m/%Y"), " ", -904)
try:
valideaza_pachet(alt_pachet)
assert False
except Exception as ex:
assert(str(ex) == "wrong dates!\nwrong destination!\nwrong price!\n")
def test_creeaza_pachet():
data_i_string = '24/08/2021'
data_i = datetime.strptime(data_i_string, "%d/%m/%Y")
data_s_string = '26/08/2021'
data_s = datetime.strptime(data_s_string, "%d/%m/%Y")
dest = "Galati"
pret = 9000.1
pachet = creeaza_pachet(data_i,data_s,dest,pret)
assert (get_data_i(pachet) == data_i)
assert (get_data_s(pachet) == data_s)
assert (get_destinatie(pachet) == dest)
assert (abs(get_pret(pachet) - pret) < 0.0001)
def run_teste():
test_creeaza_pachet()
test_valideaza_pachet()
def run():
pass
def main():
run()
run_teste()
main()发布于 2021-10-17 13:57:17
这更像是一次代码评审,有点离题,但是.第一,
删除所有calendar
dict[key],只要您不使用自定义类),
run和< code >D12函数(同样是卷积的)--只需调用所需的函数(H 213f 214)然后可以更改valideaza_pachet以引发特定的值错误:
def valideaza_pachet(pachet):
if pachet["data_i"] >= pachet["data_s"]:
raise ValueError("start date must be < end date")
if pachet["dest"] == " ":
raise ValueError("destination must not be empty")
if pachet["pret"] <= 0:
raise ValueError("price must be >= 0")
# returns None if no exception was raised现在,要测试一个有效的包,只需
valideaza_pachet(pachet) # no exception expected如果没有一个可以进行单元测试的类(例如,here),测试一个无效的包会稍微复杂一些--但是您可以捕获异常并使用try/ but的use子句来引发一个AssertionError,该AssertionError表示您需要一个异常:
try:
valideaza_pachet(pachet_gresit)
except Exception as ex:
print(f"successfully received exception: {ex}")
else:
raise AssertionError("validation should have raised an Exception")甚至是
assert str(ex) == "start date must be < end date", f"got '{ex}', expected 'start date must be < end date'"代替print语句。
https://stackoverflow.com/questions/69604286
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