Python条件判断代码问题求助：输入任意内容均输出‘Nice’

Hey there! Great job writing your first Python code—let's get that little issue sorted out where every input prints "Nice" instead of the right message.

The Problem in Your Code #

Your condition checks have two small but impactful mistakes:

• Using is instead of == for string comparison: is checks if two objects are the exact same instance in memory, while == compares the actual value of the strings. For most cases, you want == when comparing text.
• Incorrect or condition structure: Lines like if x is "Apple" or "apple" don't work how you think. Python reads this as (x is "Apple") or ("apple")—and since non-empty strings are always "truthy", the "apple" part will always be True. That's why every input triggers the first if block!

Fixed Code #

Here's the corrected version with cleaner, working logic:

print("Hi and welcome to our online shop.\n\nWhich fruit would you like to buy? Apple, Banana or Strawberry?")
x = input()
# Convert input to lowercase to handle any capitalization easily
if x.lower() == "apple":
    print("Nice.")
elif x.lower() == "banana":
    print("Great.")
elif x.lower() == "strawberry":
    print("Cool.")
else:
    print("Please enter an available product")

What Changed? #

• Swapped is for == to correctly compare string values.
• Used x.lower() to convert the input to all lowercase—this way, inputs like "APPLE", "Apple", or "apple" will all match, making your code more user-friendly.
• Removed the redundant or checks by using .lower()—no need to list every capitalization variant!

If you want to stick to checking exact matches without .lower(), you could write conditions like x == "Apple" or x == "apple", but the .lower() approach is cleaner.

Keep up the good work—you're off to a great start!

内容的提问来源于stack exchange，提问作者9cc9x