Python中将字符串转换为变量名的示例详解

# Creating a dictionary to store values
variable_dict = {}

# Converting a string into a variable name and assigning a value
variable_name = "my_variable"
variable_value = 42
variable_dict[variable_name] = variable_value

# Accessing the value using the converted string
retrieved_value = variable_dict[variable_name]
print(f"{variable_name}: {retrieved_value}")

my_variable: 42

# Using globals() to create a global variable
variable_name = "my_global_variable"
variable_value = 55
globals()[variable_name] = variable_value

# Accessing the global variable
retrieved_value = globals()[variable_name]
print(f"{variable_name}: {retrieved_value}")

my_global_variable: 55

# Converting a string into a variable name using exec()
variable_name = "my_dynamic_variable"
variable_value = 111

# Create the variable dynamically using exec()
exec(f"{variable_name} = {variable_value}")

# Accessing the dynamically created variable
retrieved_value = my_dynamic_variable
print(f"{variable_name}: {retrieved_value}")

my_dynamic_variable: 111

# Creating a class with dynamic attributes
class VariableContainer:
	def __init__(self):
		self.variables = {}

	def add_variable(self, name, value):
		self.variables[name] = value

	def get_variable(self, name):
		return self.variables.get(name)

# Create an instance of the class
container = VariableContainer()

# Adding variables dynamically
variable_name = "my_dynamic_var"
variable_value = "Hello, World!"
container.add_variable(variable_name, variable_value)

# Accessing the variable
retrieved_value = container.get_variable(variable_name)
print(f"{variable_name}: {retrieved_value}")

my_dynamic_var: Hello, World!