Python 中的除法运算 // 和 /

from __future__ import division
#<strong style="border: 0px; font-style: normal; font-variant: normal; font-weight: bold; font-stretch: inherit; line-height: 0px; font-family: 'Whitney SSm A', 'Whitney SSm B', Avenir, 'Helvetica Neue', 'Segoe UI', Helvetica, Arial, Ubuntu, sans-serif; font-size: 12px; margin: 0px; outline: 0px; padding: 0px; vertical-align: baseline; word-wrap: break-word; word-break: break-word; color: rgb(57, 66, 78); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 1; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);">Note: The<span> </span><code style="border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; line-height: inherit; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 1em; margin: 0px; outline: 0px; padding: 3px; vertical-align: baseline; color: rgb(246, 80, 57); border-radius: 3px; word-wrap: break-word; word-break: break-word; background: rgb(248, 248, 248);">__</code><span> </span>in<span> </span><code style="border: 0px; font-style: inherit; font-variant: inherit; font-weight: inherit; font-stretch: inherit; line-height: inherit; font-family: Menlo, Monaco, Consolas, 'Courier New', monospace; font-size: 1em; margin: 0px; outline: 0px; padding: 3px; vertical-align: baseline; color: rgb(246, 80, 57); border-radius: 3px; word-wrap: break-word; word-break: break-word; background: rgb(248, 248, 248);">__future__</code><span> </span>is a double underscore.</strong>

print 4/3

print 4//3

# OUTPUT:
# 1.33333333333
# 1