Python 3:字符串之间的比较

Raisul Islam • 3 年前 • 1454 次点击

我想知道,

weeks = '2 Weeks'
months = '1 Months'

if weeks < months:
    print(f'{weeks} is less than {months}')
else:
    print(f'{weeks} is greater than {months}')

所以在字符串中,它只比较字符串中的数字。因此,它正在打印“2周大于1个月”。如果我将值从“1个月”增加到“3个月”,则打印“2周小于3个月”。它如何检测自身以进行正确的比较?

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1454 次点击

文章 [ 2 ] | 最新文章 3 年前

• 1 楼

Tom 3 年前

这是我的例子,比Vasias长一点:):

week = input('Week: ') # Get the weeks
month = input('Month: ') # Get the months

# Get the numbers in weeks and months
numberWeek = []
numberMonth = []

numbers = ['1', '2', '3', '4', '5', '6', '7', '8', '9']

for letter in week:
    for num in numbers:
        if num in letter:
            numberWeek.append(letter)

for letter in month:
    for num in numbers:
        if num in letter:
            numberMonth.append(letter)

numberWeek = ''.join(numberWeek)
numberWeek = int(numberWeek)

numberMonth = ''.join(numberMonth)
numberMonth = int(numberMonth)

# Convert the number of weeks to month
numberWeek = numberWeek / 4

# Output
if numberWeek < numberMonth:
    print(f'{week} is less than {month}')
elif numberWeek > numberMonth:
    print(f'{week} is greater than {month}')
elif numberWeek == numberMonth:
    print(f'{week} is the same as {month}')

• 2 楼

vasia 3 年前

首先需要从字符串中获取周数或月数,然后比较这些数字。仅仅通过比较字符串,你就是在按字典顺序比较它们,这并不能提供你想要的东西。获取周数或月数的一种方法:

weeks = '2 Weeks'
months = '1 Months'

num_weeks = int(weeks.split()[0])
num_months = int(months.split()[0])

if num_weeks < (num_months * 4):
    print(f'{num_weeks} is less than {num_months}')
else:
    print(f'{num_weeks} is greater than {num_months}')

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