Python数据类型转换

偏执的太偏执、 2022-05-20 10:15 269阅读 0赞

有时候，我们需要对数据内置的类型进行转换，数据类型的转换，你只需要将数据类型作为函数名即可。

以下几个内置的函数可以执行数据类型之间的转换。这些函数返回一个新的对象，表示转换的值。

<table> 
 <tbody> 
 <tr> 
 <th>函数</th> 
 <th>描述</th> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-int.html" rel="nofollow">int(x [,base])</a> </td> 
 <td> 将x转换为一个整数 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-long.html" rel="nofollow">long(x [,base] )</a> </td> 
 <td> 将x转换为一个长整数 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-float.html" rel="nofollow">float(x)</a> </td> 
 <td> 将x转换到一个浮点数 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-complex.html" rel="nofollow">complex(real [,imag])</a> </td> 
 <td> 创建一个复数 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-str.html" rel="nofollow">str(x)</a> </td> 
 <td> 将对象 x 转换为字符串 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-repr.html" rel="nofollow">repr(x)</a> </td> 
 <td> 将对象 x 转换为表达式字符串 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-eval.html" rel="nofollow">eval(str)</a> </td> 
 <td> 用来计算在字符串中的有效Python表达式,并返回一个对象 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/att-tuple-tuple.html" rel="nofollow">tuple(s)</a> </td> 
 <td> 将序列 s 转换为一个元组 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/att-list-list.html" rel="nofollow">list(s)</a> </td> 
 <td> 将序列 s 转换为一个列表 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-set.html" rel="nofollow">set(s)</a> </td> 
 <td> 转换为可变集合 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-dict.html" rel="nofollow">dict(d)</a> </td> 
 <td> 创建一个字典。d 必须是一个序列 (key,value)元组。 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-frozenset.html" rel="nofollow">frozenset(s)</a> </td> 
 <td> 转换为不可变集合 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-chr.html" rel="nofollow">chr(x)</a> </td> 
 <td> 将一个整数转换为一个字符 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-unichr.html" rel="nofollow">unichr(x)</a> </td> 
 <td> 将一个整数转换为Unicode字符 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-ord.html" rel="nofollow">ord(x)</a> </td> 
 <td> 将一个字符转换为它的整数值 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-hex.html" rel="nofollow">hex(x)</a> </td> 
 <td> 将一个整数转换为一个十六进制字符串 </td> 
 </tr> 
 <tr> 
 <td> <a href="http://www.runoob.com/python/python-func-oct.html" rel="nofollow">oct(x)</a> </td> 
 <td> 将一个整数转换为一个八进制字符串 </td> 
 </tr> 
 </tbody> 
</table>