Finish most lines in section 1

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Geoff Liu 2014-10-24 11:24:51 -04:00
parent d7d131f440
commit c917dc75ac

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@ -42,9 +42,9 @@ Note: This article applies to Python 3 specifically. Check out the other tutoria
35 / 5 # => 7.0
5 / 3 # => 1.6666666666666667
# Result of integer division truncated down both for positive and negative.
# 整数除法的结果都是向下取整
5 // 3 # => 1
5.0 // 3.0 # => 1.0 # works on floats too
5.0 // 3.0 # => 1.0 # 浮点数也可以
-5 // 3 # => -2
-5.0 // 3.0 # => -2.0
@ -107,22 +107,20 @@ False or True #=> True
# 字符串可以被当作字符列表
"This is a string"[0] # => 'T'
# .format can be used to format strings, like this:
# 用.format来格式化字符串
"{} can be {}".format("strings", "interpolated")
# You can repeat the formatting arguments to save some typing.
# 可以重复参数以节省时间
"{0} be nimble, {0} be quick, {0} jump over the {1}".format("Jack", "candle stick")
#=> "Jack be nimble, Jack be quick, Jack jump over the candle stick"
# You can use keywords if you don't want to count.
# 如果不想数参数,可以用关键字
"{name} wants to eat {food}".format(name="Bob", food="lasagna") #=> "Bob wants to eat lasagna"
# If your Python 3 code also needs to run on Python 2.5 and below, you can also
# still use the old style of formatting:
# 如果你的Python3程序也要在Python2.5以下环境运行,也可以用老式的格式化语法
"%s can be %s the %s way" % ("strings", "interpolated", "old")
# None is an object
# None是一个对象
None # => None
# Don't use the equality "==" symbol to compare objects to None
@ -130,8 +128,8 @@ None # => None
"etc" is None # => False
None is None # => True
# None, 0, and empty strings/lists/dicts all evaluate to False.
# All other values are True
# None0空字符串空列表空关联数组都算是False
# 所有其他值都是True
bool(0) # => False
bool("") # => False
bool([]) #=> False