Python3：我如何 append 多个键、值对到 for 循环中的字典？

Question

I want to append key, value pairs to my empty dictionary.

I can succeed with one object but not multiple:

a[key] = [value]

My code returns error 'TypeError: update expected at most 1 arguments, got 2' - Is it possible to pass the key, values as variables?

dict = {"Avv": 33333, "Animal": 22, "color": 12, "location": 40000000}

a = {}

for key, value in dict.items():
    if key.startswith("A"):
        a.update(key, value)
    else:
        #does something

Desired outcome:

print(a)
{"Avv": 33333, "Animal": 22}

Answer 1

You can use this simple one liner

a = {k:v for (k,v) in dict.items() if k.startswith("A")}

Answer 2

You can use a dictionary comprehension:

a = {key: value for key, value in dict.items() if key.startswith("A")}

Also, I would avoid naming your first dictionary dict . That's a builtin name in Python, so it could mess up code further down the script. Try something like my_dictionary, or something more descriptive of what it's meant to hold.