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pythonreval

R's eval(parse(text=text)) equivalent in Python

I'm looking for a way to assign variables dynamically using loop & functions in Python. One way I can do so in R is by using eval(parse(text=text)). For example, assuming I have this code:

var <- c('First','Second','Third')

for (i in 1:length(var)){
  text <- paste0("Variable_", var[i], " <- ", i)
  eval(parse(text = text))
}

And my desired output is as follow:

> Variable_First
[1] 1
> Variable_Second
[1] 2
> Variable_Third
[1] 3

What is the equivalent way of doing such in Python?

Thanks in advance!

Solution

  • Use dictionaries to accomplish something similar: "variable" variables in a restricted namespace. For example, here a dictionary comprehension is used to assign to dictionary dct:

    lst = ['First','Second','Third']
dct = {f'Variable_{s}': i for i, s in enumerate(lst)}
print(dct)
# {'Variable_First': 0, 'Variable_Second': 1, 'Variable_Third': 2}