In Python 2.x The following example makes use of the iteritems() function to get a variable name as a string in Python. 1 2 3 4 5 6 # Python 2 code x = 7 x = [ i for i, a in locals().iteritems() if a == x][0] print("The variable name:", x) The above code pr...
importnumpyasnp# 导入NumPy库用于进行数值操作 1. 步骤2:创建动态变量 我们可以使用globals()函数将字符串转换为变量名。以下示例中,我们将字符串var_name赋值为一个数字 10。 var_name="my_variable"# 定义变量名为字符串globals()[var_name]=10# 动态创建变量 1. 2. 这里的globals()返回一个字典,表示当前...
python入门学习(五 字符串string和变量variable) 1.字符串 一串字符显示或者打印出来文字信息 双引号,单引号,三引号 双引号:解析功能 单引号:无 三引号:保存文本格式 Format方法 age = 3name="jason"print("{0} was {1} years old".format(name, age))print(name +"was"+ str(age) +"years old") 2....
# Variable name and value as stringsvariable_name="dynamicVar"value=42# Constructing and executing the string as Python codeexec(f"{variable_name} = {value}")# Access and print the newly created variableprint(dynamicVar) In our code, we start by defining two strings:variable_name, which is...
If you really want a string variable that can be used in all your CheckedChanged events, you need to give it a unique name (not the same as a Label or TextBox) and declare it outside of any Sub. For example.prettyprint 复制
As of Python version 3.6, it's possible to usef-strings. These strings look like templates and use the variable names from your code. Using f-strings in the preceding example would look like this: Python print(f"On the Moon, you would weigh about{mass_percentage}of your weight on Earth...
functions and variables whatever they want, and the variable names won't conflict — module1.foo is different from module2.foo. In the Python vocabulary, we'd say that binky, module1, and module2 each have their own "namespaces," which as you can guess are variable name-to-object ...
When you add strings, Python doesn't modify any string, but it returns a new string as the result. To keep this new result, assign it to a new variable:Python Copy fact = "The Moon has no atmosphere." two_facts = fact + "No sound can be heard on the Moon." print(two_facts)...
importstringvalues={'var':'foo'}t=string.Template("""Variable : $varEscape : $$Variable in text: ${var}iable""")print('TEMPLATE:',t.substitute(values)) 输出: TEMPLATE:Variable:fooEscape:$Variableintext:fooiable 使用%插值标记 importstringvalues={'var':'foo'}s="""Variable :%(var)sEsc...
The str_isidentifier function checks whether a string is a valid Python identifier or checks whether a variable name is valid. Syntax str_isidentifier(value) Parameters Parameter Type Required Description value Arbitrary (automatically converted to the string type) Yes The string that you want to ...