jupyter notebook 使用

import time

for i in range(50):
    time.sleep(2)
    print(i)

0
1
2
3
4



---------------------------------------------------------------------------

KeyboardInterrupt                         Traceback (most recent call last)

<ipython-input-3-bc63d84f518d> in <module>()
      2 
      3 for i in range(50):
----> 4     time.sleep(2)
      5     print(i)


KeyboardInterrupt: 

print(‘Hello World!’)

a = 1

print(a)

1