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authorGeoff Liu <cangming.liu@gmail.com>2014-10-31 15:40:49 -0600
committerGeoff Liu <cangming.liu@gmail.com>2014-10-31 15:40:49 -0600
commitba5c351f216ca63e4f46230db683224fd6d26355 (patch)
treef2768be34779696d203b8ee14508b4828629d900 /zh-cn/python3-cn.html.markdown
parentc917dc75ac25641b86ecd2d14928175c3d1cc684 (diff)
A bit of section 2, 3, 4
Diffstat (limited to 'zh-cn/python3-cn.html.markdown')
-rw-r--r--zh-cn/python3-cn.html.markdown90
1 files changed, 45 insertions, 45 deletions
diff --git a/zh-cn/python3-cn.html.markdown b/zh-cn/python3-cn.html.markdown
index e297a7ce..78ecb4af 100644
--- a/zh-cn/python3-cn.html.markdown
+++ b/zh-cn/python3-cn.html.markdown
@@ -140,60 +140,60 @@ bool({}) #=> False
## 2. 变量和集合
####################################################
-# Python has a print function
+# print是内置的打印函数
print("I'm Python. Nice to meet you!")
-# No need to declare variables before assigning to them.
-# Convention is to use lower_case_with_underscores
+# 在给变量赋值前不用提前声明
+# 传统的变量命名是小写,用下划线分隔单词
some_var = 5
some_var # => 5
-# Accessing a previously unassigned variable is an exception.
-# See Control Flow to learn more about exception handling.
-some_unknown_var # Raises a NameError
+# 存取未赋值的变量会抛出异常
+# 下面流程控制一段更深入讲解异常处理
+some_unknown_var # 抛出NameError
-# Lists store sequences
+# 用列表(list)储存序列
li = []
-# You can start with a prefilled list
+# 创建列表时也可以同时赋给元素
other_li = [4, 5, 6]
-# Add stuff to the end of a list with append
-li.append(1) # li is now [1]
-li.append(2) # li is now [1, 2]
-li.append(4) # li is now [1, 2, 4]
-li.append(3) # li is now [1, 2, 4, 3]
-# Remove from the end with pop
-li.pop() # => 3 and li is now [1, 2, 4]
-# Let's put it back
-li.append(3) # li is now [1, 2, 4, 3] again.
-
-# Access a list like you would any array
+# 用append在列表最后追加元素
+li.append(1) # li现在是[1]
+li.append(2) # li现在是[1, 2]
+li.append(4) # li现在是[1, 2, 4]
+li.append(3) # li现在是[1, 2, 4, 3]
+# 用pop从列表尾部删除
+li.pop() # => 3 且li现在是[1, 2, 4]
+# 把3再放回去
+li.append(3) # li变回[1, 2, 4, 3]
+
+# 列表取值跟数组一样
li[0] # => 1
-# Look at the last element
+# 取出最后一个元素
li[-1] # => 3
-# Looking out of bounds is an IndexError
-li[4] # Raises an IndexError
+# 越界读取会造成IndexError
+li[4] # 抛出IndexError
-# You can look at ranges with slice syntax.
+# 列表的切割语法
# (It's a closed/open range for you mathy types.)
li[1:3] # => [2, 4]
-# Omit the beginning
+# 取尾
li[2:] # => [4, 3]
-# Omit the end
+# 取头
li[:3] # => [1, 2, 4]
-# Select every second entry
+# 每两个取一个
li[::2] # =>[1, 4]
-# Revert the list
+# 倒排列表
li[::-1] # => [3, 4, 2, 1]
# Use any combination of these to make advanced slices
# li[start:end:step]
-# Remove arbitrary elements from a list with "del"
+# 用del删除任何一个元素
del li[2] # li is now [1, 2, 3]
-# You can add lists
-# Note: values for li and for other_li are not modified.
+# 列表可以相加
+# 注意:li和other_li的值都不变
li + other_li # => [1, 2, 3, 4, 5, 6]
# Concatenate lists with "extend()"
@@ -211,7 +211,7 @@ tup = (1, 2, 3)
tup[0] # => 1
tup[0] = 3 # Raises a TypeError
-# You can do all those list thingies on tuples too
+# 列表允许的操作元组也可以
len(tup) # => 3
tup + (4, 5, 6) # => (1, 2, 3, 4, 5, 6)
tup[:2] # => (1, 2)
@@ -301,17 +301,17 @@ filled_set | other_set # => {1, 2, 3, 4, 5, 6}
## 3. 流程控制和迭代器
####################################################
-# Let's just make a variable
+# 先随便定义一个变量
some_var = 5
-# Here is an if statement. Indentation is significant in python!
-# prints "some_var is smaller than 10"
+# 这是个if语句。注意缩进在Python里是有意义的
+# 印出"some_var比10小"
if some_var > 10:
- print("some_var is totally bigger than 10.")
-elif some_var < 10: # This elif clause is optional.
- print("some_var is smaller than 10.")
-else: # This is optional too.
- print("some_var is indeed 10.")
+ print("some_var比10大")
+elif some_var < 10: # elif句是可选的
+ print("some_var比10小")
+else: # else也是可选的
+ print("some_var就是10")
"""
@@ -399,16 +399,16 @@ list(filled_dict.keys()) #=> Returns ["one", "two", "three"]
## 4. 函数
####################################################
-# Use "def" to create new functions
+# 用def定义新函数
def add(x, y):
print("x is {} and y is {}".format(x, y))
- return x + y # Return values with a return statement
+ return x + y # 用return语句返回
-# Calling functions with parameters
-add(5, 6) # => prints out "x is 5 and y is 6" and returns 11
+# 调用函数
+add(5, 6) # => 印出"x is 5 and y is 6"并且返回11
-# Another way to call functions is with keyword arguments
-add(y=6, x=5) # Keyword arguments can arrive in any order.
+# 也可以用关键字参数来调用函数
+add(y=6, x=5) # 关键字参数可以用任何顺序
# You can define functions that take a variable number of