how to print a string in a variable based on what the user inputs?-CodePudding

x = '123'
#asks for input, user inputs x
#prints 123

how can I print a variable based on user input?

CodePudding user response：

input() can be used to fetch input from the command line.

name = input("Your Name: ")
print("Hello there, "   name   "!")

CodePudding user response：

Dynamic variable name is not recommended, especially in this situation because you are directly taking the user input. But if you really want to implement it, globals() is one option:

x = '123'
y = '456'

which = input('What do you want to see?: ') # x
print(globals()[which]) # 123

A better and more secure approach would be to use a dict:

user_vars = {'x': '123', 'y': '456'}

which = input('What do you want to see?: ') # x
print(user_vars[which]) # 123

CodePudding user response：

You can make use of the dictionary in python as follows:

user_options = {'x': '123', 'y': '456', 'z': '789'}

entered_value = input('Please enter an input?: ') # could be x, y or z depending upon the dictionary
print(user_options[entered_value])

This should give you the number depending on if x,y, or z is entered

CodePudding user response：

You can also use eval(),

The eval() method parses the expression passed to this method and runs python expression (code) within the program.

x = '123'
try:
    print(eval(input()))
except NameError:
    print("Invalid variable name")