如何将用户输入作为变量名，并为其分配字典、列表等数据结构？

Great question! Let’s break down how to assign dictionaries (or other data structures like lists and sets) to a variable name that a user inputs directly in Python. The key thing to know is: you can’t directly write input("Insert Exercise Name: ") = { ... } because the left side of an assignment needs to be a valid variable name (an identifier). Instead, we can use Python’s namespace tools or a dedicated container to make this happen.

Assigning to User-Defined Variable Names #

For Dictionaries

Here’s how you can make your exercise dictionary example work using the global namespace (globals()):

# Define your exercise data first
exercise_details = {"sets": 3, "reps": 12, "weight": 100}
# Get the desired variable name from the user
exercise_name = input("Insert Exercise Name: ")
# Assign the dictionary to that variable name in the global scope
globals()[exercise_name] = exercise_details

# Test it out: if the user entered "bench_press", you can now use that variable
print(bench_press)  # Output: {'sets': 3, 'reps': 12, 'weight': 100}

For Lists

The exact same logic applies to lists. Let’s say you want to assign a list of workout tips to a user-named variable:

tip_list = ["Warm up for 5 minutes", "Keep core tight"]
var_name = input("Enter a name for your tip list: ")
globals()[var_name] = tip_list

# If the user entered "squat_tips", this will work
print(squat_tips)  # Output: ['Warm up for 5 minutes', 'Keep core tight']

For Sets

No changes needed for sets either—just swap out the data structure:

required_equipment = {"dumbbells", "mat", "resistance band"}
var_name = input("Enter a name for your equipment set: ")
globals()[var_name] = required_equipment

# If the user entered "yoga_gear", check the output
print(yoga_gear)  # Output: {'dumbbells', 'mat', 'resistance band'}

A Safer, More Organized Alternative #

Using globals() can clutter your code’s namespace and risk overwriting existing variables accidentally. A better practice is to store all your user-named data in a dedicated dictionary. This keeps everything organized and avoids unexpected issues:

# Create a container to hold all your workout data
workout_log = {}

# Get the exercise name and assign the data to the container
exercise_name = input("Insert Exercise Name: ")
workout_log[exercise_name] = {"sets": 3, "reps": 12, "weight": 100}

# Access the data later using the container
print(workout_log[exercise_name])  # Output: {'sets': 3, 'reps': 12, 'weight': 100}
# Or if you know the exact name the user entered
print(workout_log["bench_press"])

内容的提问来源于stack exchange，提问作者Antônio Gonçalves