testunaryop.py

来自「Python Development Environment (Python I」· Python 代码 · 共 14 行

# before
x = 5
# before
x = -x # on-line
# after
y = +4
# this is a binary op !
y -= 1
# this is a unary op again
print ~x
print (not y and x)
print (y and not x)
print not x