如何知道用户是否使用 Python 按下了 Enter 键
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How to know if a user has pressed the Enter key using Python
提问by user116284
How to know if a user has pressed Enterusing Python ?
如何知道用户是否按下了EnterPython ？
For example :
例如 ：
user = raw_input("type in enter")
if user == "enter":
print "you pressed enter"
else:
print "you haven't pressed enter"
回答by julienc
As @jonrsharpe said, the only way to exit properly the inputfunction is by pressing enter. So a solution would be to check if the result contains something or not:
正如@jonrsharpe 所说，正确退出该input功能的唯一方法是按 Enter。因此，解决方案是检查结果是否包含某些内容：
text = input("type in enter") # or raw_input in python2
if text == "":
print("you pressed enter")
else:
print("you typed some text before pressing enter")
The only other ways I see to quit the inputfunction would throw an exception such as:
我看到的退出input函数的唯一其他方法会引发异常，例如：
EOFErrorif you type^DKeyboardInterruptif you type^C- ...
EOFError如果你输入^DKeyboardInterrupt如果你输入^C- ...
回答by MIGHTY BOMBER
user_input=input("ENTER SOME POSITIVE INTEGER : ")
if((not user_input) or (int(user_input)<=0)):
print("ENTER SOME POSITIVE INTEGER GREATER THAN ZERO") #print some info
import sys #import
sys.exit(0) #exit program
'''
#(not user_input) checks if user has pressed enter key without entering
# number.
#(int(user_input)<=0) checks if user has entered any number less than or
#equal to zero.
'''
