首先,Convert.ToInt32(),可以转换的类型比较多,可以将object类类型转换为int类型,而int.Parse若转换数字以外的类型就会报错。使用此函数时,若被转换内容为null时,返回0;若为“”,就会抛出异常;此方法与int.Parse也是较为类似的,实际上Convert.ToInt32() 内部调用了 int.Parse。 还需要注意一些小的细节,当参数为...
string.split("\"c,stringsplitoptions.removeemptyentries):对字符串按"\"符号进行分割,并且过滤里面的空白元素,c是固定的,因为split切割是char类型 示例: string.format string.format("{0:d3}",a),其中a为变量,数据类型int32;d为10进制,d3代表000,依次类推 0:d5,代表5个0,想要多少个零就d几就好 示例: ...
int()is very limited when it comes to expressions it can parse. If it receives an input string that cannot be converted to an integer due to an incompatible form, it will raise aValueErrorexception. Therefore, it's recommended to use a validation method ortry-catchblock when usingint()for...
pythonstring与int转化 pythonstring与int转化 1）int --> string str是保留关键字，a = 10 str1 = str(a)2)string --> int string a; 1、type.parse.. float.Parse(a); Int32.Parse(a); 2/Convert. Convert.ToInt32(a); 3/强制显⽰转换 int b=(int)a;
How to convert a Python string to anint How to convert a Pythonintto a string Now that you know so much aboutstrandint, you can learn more about representing numerical types usingfloat(),hex(),oct(), andbin()! Watch NowThis tutorial has a related video course created by the Real Pyth...
1)int --> stringstr是保留关键字,a = 10str1 = str(a)2)string --> intstring a; 1、type.parse.. float.Parse(a); Int32.Parse(a); 2/Convert. Convert.ToInt32
分析如下：float（'30.7894'）=30.7894;python中的字符数字之间的转换函数：
eval("123.0")123.0>>> ast.literal_eval("123")123>>> ast.literal_eval("a123.4")Traceback (most recent call last): File "<pyshell>", line 1, in <module> File "D:\Backup\Desktop\thonny\lib\ast.py", line 46, in literal_eval node_or_string = parse(node_or_string, mod...
388 389 """ 390 return _float(s) 391 392 393 # Convert string to integer 394 def atoi(s , base=10): 395 """atoi(s [,base]) -> int 396 397 Return the integer represented by the string s in the given 398 base, which defaults to 10. The string s must consist of one 399 ...
从文件中读取数据时常需要从字符串形式变成时间对象,就会用到strptime,是string parse time的简写,即从字符串数据类型中解析成时间类型。strftime是把时间类型格式化为字符串,是strptime的逆操作,f是format的缩写。时间类型格式化有一套特定的占位符,下面介绍的符号在其他时间模块里也通用,因此常用的占位符还是需要心里有...