CODEWITHSUNDEEP
pythonfor-loop
Sercan Noyan Germiyanoğlu
Sercan Noyan Germiyanoğlu

Reputation: 2701

How can I search any item in many list very efficiently?

I have a problem to find very efficient way to search birthday in many list.

Here is my horoscope_dates function

def calculate_horoscope_dates(start, end):
    horoscope_start = datetime.datetime.strptime(start, "%m-%d-%Y")
    horoscope_end = datetime.datetime.strptime(end, "%m-%d-%Y")
    horoscope_interval = [horoscope_start + datetime.timedelta(days=x) for x in range(0, (horoscope_end-horoscope_start).days)]

    string_interval = []
    for date in horoscope_interval:
        #convert datetime to str
        string_interval.append(date.strftime("%d-%m-%Y"))
        # remove minutes and seconds from date
        string_interval = [i.lstrip("0") for i in string_interval]

    return string_interval

Here is my horoscope list shown below

aries = calculate_horoscope_dates("3-21-2020", "4-20-2020")
taurus = calculate_horoscope_dates("4-20-2020", "5-21-2020")
gemini = calculate_horoscope_dates("5-21-2020", "6-22-2020")
...

aries list is defined shown below. Other list is the same as a defined list.

['21-03-2020',
 '22-03-2020',
 '23-03-2020',....]

Here is my input part

month = input("Enter your month of birth: " )
day = input("Enter your day of birth: " )
birthday = day + "-0" + month + "-2020"
birthday

I can do search process via for loop but I think it is not very efficient way to do the process because I can write repeatly this code show below.

for birthday_date in aries:
    if birthday in birthday_date:
        print("Aries")

What I want to ask is learn how to find birthday in many list very efficiently.

Edit 

horoscope_dates = {"aries": aries,
                   "taurus": taurus,
                   "gemini": gemini,
                   "cancer": cancer,
                   "leo": leo,
                   "virgo": virgo,
                   "libra": libra,
                   "scorpio": scorpio,
                   "sagittarius": sagittarius,
                   "capricorn": capricorn,
                   "aquarius": aquarius,
                   "pisces": pisces,
                   }



for h in horoscope_dates:
    start, end = horoscope_dates[h] <- Error
    if start <= birthday < end:
        print(h)

There is an issue there (ValueError: too many values to unpack (expected 2))

Upvotes: 0

Views: 53

Answers (1)

sahinakkaya
sahinakkaya

Reputation: 6056

from datetime import date

horoscope_dates = {"aries": (date(2020, 3, 21), date(2020, 4, 20)),
                   "taurus": (date(2020, 4, 20), date(2020, 5, 21)),
                   "gemini": (date(2020, 5, 21), date(2020, 6, 22)),
                   }

month = int(input("Enter your month of birth: "))
day = int(input("Enter your day of birth: "))
year = 2020
birthday = date(year, month, day)

for horoscope, (start, end) in horoscope_dates.items():
    if start <= birthday < end:
        print(horoscope)
        break

Upvotes: 1

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