我可以在 Python 3 中访问循环中变量的内存位置和值（指针和引用）吗

Question

my_num_1 = 10
my_num_2 = 20

# I want to assign value 5 to above two variables like this:

for num in [my_num_1, my_num_2]:
    num = 5

那不行。那么有没有办法做这样的伪代码：

for num in [(address_of)my_num_1, (address_of)my_num_2]:
    (value_at)num = 5

我知道代码和应用程序很糟糕。但是有没有办法像这样在 Python 中使用指针和（取消）引用？

Answer 1

假设您是 Python

的初学者

你要的是字典或列表。如果您需要变量名，请使用字典，但在这种情况下，列表可能是更好的主意。

字典示例实现：

nums={
    "my_1": 10,
    "my_2": 20,
} #Create a dictionary of your nums

print(nums["my_1"]) #10
print(nums["my_2"]) #20

for num in nums: #Iterate through the keys of the dictionary
    nums[num] = 5 #and set the values paired with those keys to 5

print(nums["my_1"]) #5
print(nums["my_2"]) #5

列出示例实现：

nums = [10, 20] #Create a list and populate it with your numbers

print(nums[0]) #10
print(nums[1]) #20

for num in range(len(nums)): #Keys for your list
    nums[num] = 5 #Set the values within the list

print(nums[0]) #5
print(nums[1]) #5

假设您是一个中等水平的程序员

您可以改变 globals() 字典。

my_num_1 = 10
my_num_2 = 20

print(my_num_1) #10
print(my_num_2) #20

for name in ("my_num_1", "my_num_2"): #Iterate through a tuple of your names
    globals()[name] = 5 #and mutate the globals dict

print(my_num_1) #5
print(my_num_2) #5

我可以在 Python 3 中访问循环中变量的内存位置和值（指针和引用）吗

Can I access memory location and values ( pointers and reference ) for variables in a loop, in Python 3

python

memory

pointers

reference

for-in-loop

假设您是 Python

假设您是一个中等水平的程序员