Python中的数组|集1（简介和函数）-yiteyi-C++库

除了一些通用容器，比如列表，Python在其定义中还可以处理具有指定数据类型的容器。该数组可以由一个名为“”的模块在python中处理大堆 “。当我们必须只操作特定的数据类型值时，它们可能很有用。

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阵列上的操作：

1.数组（数据类型、值列表） ：-此函数用于创造在其参数中指定了数据类型和值列表的数组。下表中提到了一些数据类型。

类型代码	C型	Python类型	最小大小（字节）
“b”	签名字符	智力	1.
“B”	无符号字符	智力	1.
“你”	Py_UNICODE	unicode字符	2.
“h”	短签名	智力	2.
“H”	未签名短	智力	2.
“我很高兴	有符号整型	智力	2.
“我很高兴	无符号整型	智力	2.
“我	长签名	智力	4.
“我	未签名长	智力	4.
“q”	签了很久	智力	8.
“Q”	无符号长	智力	8.
“f”	浮动	浮动	4.
“是的”	双重的	浮动	8.

2.附加（） ：-此函数用于 增加价值 在辩论中提到终止阵列的一部分。 3.插入（i，x） ：-此函数用于 在第i个位置添加值（x） 在其参数中指定。

Python3

                         # Python code to demonstrate the working of                       
                         # array(), append(), insert()                       
                                   
                         # importing "array" for array operations                       
                         import                                     array                       
                                   
                         # initializing array with array values                       
                         # initializes array with signed integers                       
                         arr                                     =                                     array.array(                                     'i'                                     , [                                     1                                     ,                                     2                                     ,                                     3                                     ])                       
           
                         # printing original array                       
                         print                                     (                                     "The new created array is : "                                     ,end                                     =                                     " "                                     )                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     3                                     ):                       
                                                 print                                     (arr[i], end                                     =                                     " "                                     )                       
           
                         print                                     (                                     "

"                                     )                       
           
                         # using append() to insert new value at end                       
                         arr.append(                                     4                                     );                       
           
                         # printing appended array                       
                         print                                     (                                     "The appended array is : "                                     , end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     4                                     ):                       
                                                 print                                     (arr[i], end                                     =                                     " "                                     )                       
                                   
                         # using insert() to insert value at specific position                       
                         # inserts 5 at 2nd position                       
                         arr.insert(                                     2                                     ,                                     5                                     )                       
           
                         print                                     (                                     "

"                                     )                       
           
                         # printing array after insertion                       
                         print                                     (                                     "The array after insertion is : "                                     , end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     5                                     ):                       
                                                 print                                     (arr[i], end                                     =                                     " "                                     )                       

输出：

The new created array is : 1 2 3 The appended array is : 1 2 3 4 The array after insertion is : 1 2 5 3 4

4.流行音乐 ：-这个功能 移除该位置的元素 在其参数中提到并返回它。 5.删除（） ：-此函数用于 删除第一个引用 其参数中提到的值。

Python3

                         # Python code to demonstrate the working of                       
                         # pop() and remove()                       
           
                         # importing "array" for array operations                       
                         import                                     array                       
           
                         # initializing array with array values                       
                         # initializes array with signed integers                       
                         arr                                     =                                     array.array(                                     'i'                                     ,[                                     1                                     ,                                     2                                     ,                                     3                                     ,                                     1                                     ,                                     5                                     ])                       
           
                         # printing original array                       
                         print                                     (                                     "The new created array is : "                                     ,end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     5                                     ):                       
                                                 print                                     (arr[i],end                                     =                                     " "                                     )                       
           
                         print                                     (                                     "

"                                     )                       
           
                         # using pop() to remove element at 2nd position                       
                         print                                     (                                     "The popped element is : "                                     ,end                                     =                                     "")                       
                         print                                     (arr.pop(                                     2                                     ));                       
           
                         # printing array after popping                       
                         print                                     (                                     "The array after popping is : "                                     ,end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     4                                     ):                       
                                                 print                                     (arr[i],end                                     =                                     " "                                     )                       
           
                         print                                     (                                     "

"                                     )                       
           
                         # using remove() to remove 1st occurrence of 1                       
                         arr.remove(                                     1                                     )                       
           
                         # printing array after removing                       
                         print                                     (                                     "The array after removing is : "                                     ,end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     3                                     ):                       
                                                 print                                     (arr[i],end                                     =                                     " "                                     )                       

输出：

The new created array is : 1 2 3 1 5 The popped element is : 3The array after popping is : 1 2 1 5 The array after removing is : 2 1 5

6.索引（） ：-此函数返回 首次出现的索引 在论点中提到的价值。 7.反向 ：-这个功能逆转阵列。

Python3

                         # Python code to demonstrate the working of                       
                         # index() and reverse()                       
                                   
                         # importing "array" for array operations                       
                         import                                     array                       
                                   
                         # initializing array with array values                       
                         # initializes array with signed integers                       
                         arr                                     =                                     array.array(                                     'i'                                     ,[                                     1                                     ,                                     2                                     ,                                     3                                     ,                                     1                                     ,                                     2                                     ,                                     5                                     ])                       
           
                         # printing original array                       
                         print                                     (                                     "The new created array is : "                                     ,end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     6                                     ):                       
                                                 print                                     (arr[i],end                                     =                                     " "                                     )                       
           
                         print                                     (                                     "

"                                     )                       
           
                         # using index() to print index of 1st occurrence of 2                       
                         print                                     (                                     "The index of 1st occurrence of 2 is : "                                     ,end                                     =                                     "")                       
                         print                                     (arr.index(                                     2                                     ))                       
           
                         #using reverse() to reverse the array                       
                         arr.reverse()                       
           
                         # printing array after reversing                       
                         print                                     (                                     "The array after reversing is : "                                     ,end                                     =                                     "")                       
                         for                                     i                                     in                                     range                                     (                                     0                                     ,                                     6                                     ):                       
                                                 print                                     (arr[i],end                                     =                                     " "                                     )                       

输出：

The new created array is : 1 2 3 1 2 5 The index of 1st occurrence of 2 is : 1The array after reversing is : 5 2 1 3 2 1

参考： https://docs.python.org/3/library/array.html#module-阵列本文由 曼吉星 .如果你喜欢GeekSforgek，并想贡献自己的力量，你也可以使用写极客。组织或者把你的文章寄去评论-team@geeksforgeeks.org.看到你的文章出现在Geeksforgeks主页上，并帮助其他极客。如果您发现任何不正确的地方，或者您想分享有关上述主题的更多信息，请写下评论。

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