Sure, here are two ways to cast a string to an enum in Python:

1. Using the enum.from_str() method:

Python

enum MyEnum(str):
  Value1 = "VALUE1"
  Value2 = "VALUE2"
  Value3 = "VALUE3"

string = "VALUE1"

# Cast the string to an enum using the enum.from_str() method.
myEnum = enum.from_str(MyEnum, string)

In this example, the string variable is a string that has the value of "VALUE1". The MyEnum enum has three values: Value1, Value2, and Value3. The enum.from_str(MyEnum, string) method casts the string variable to an enum.

1. Using the try-except block:

Python

enum MyEnum(str):
  Value1 = "VALUE1"
  Value2 = "VALUE2"
  Value3 = "VALUE3"

string = "VALUE1"

# Cast the string to an enum using the try-except block.
try:
  myEnum = MyEnum(string)
except ValueError:
  print("The string is not a valid enum value.")

In this example, the string variable is a string that has the value of "VALUE1". The MyEnum enum has three values: Value1, Value2, and Value3. The try-except block first tries to cast the string variable to an enum. If the string variable is not a valid enum value, then the ValueError exception is raised.

Which method you use depends on your specific needs. If you need to cast a string to an enum and you don't need to do any further processing on the enum value, then the enum.from_str() method is a good option. If you need to do further processing on the enum value, then the try-except block is a good option.