如何使輸入不區分大小寫？

Question

如何處理輸入字符串，以便所有正確拼寫的單詞都被視為相同，不區分大小寫？

例如：
只要拼寫正確，可以以任何形式輸入January 。
在這里， january 、 JANUARY 、 JaNuArY - 應該被同等對待。

m = input("What month were you born?\n")
d = input("What day were you born?\n")
y = input("What year were you born\n")

months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"]

print("Your birthday is " + str(months.index(m)+1) + "/" + d + "/" + y)

Answer 1

盡管其他答案足以解決您的問題，但由於您在問題中提到了 python 字典，因此這里有一個更快、更整潔的方法 -

• 在列表中查找O(n)而在字典中查找是O(1)

months = {"January": '1', "February": '2', "March": '3', "April": '4', "May": '5', "June": '6', "July": '7', "August": '8', "September": '9', "October": '10', "November": '11', "December": '12'}

m = input("What month were you born?\n")
d = input("What day were you born?\n")
y = input("What year were you born?\n")

print("Your birthday is {0}/{1}/{2}".format(months[m.lower().capitalize()], d, y))

Answer 2

將輸入更改為：

d = input("What day were you born?\n").lower()
y = input("What year were you born\n").lower()

這會將每個字符串轉換為全小寫字符串

資源

Answer 3

在您的輸入中使用lower()和string.capitalize() function：

d = "jaNuARY"

d.lower().capitalize()
Out[2]: 'January'

這樣，您將始終獲得任何輸入的相同拼寫 - 一月而不是一月等，與您的字典相匹配。

這也是一個很好的解決方案，因為您不需要更改您的字典

Answer 4

您應該首先在months列表中使用小寫名稱。 它應該如下所示：

months = ["january", "february", ...]

使用lower()方法將輸入轉換為小寫。

m = input("What month were you born?\n").lower()

因此，接收到的輸入總是小寫的，你可以像原來一樣使用index 。

Answer 5

根據您在列表中存儲月份的方式使用.lower() 或.upper() 或[.lower() 和.capatalize()]。