如何從多個 arrays. PYTHON 中制作一本字典

Question

我想用循環中的幾個 arrays 制作一本字典

a = ["hello","hi"]
b = ["day","night"]
#And these arrays were transformed into a dictionary
c = {"a": "hello, hi", "b": "day, night"}

dictt = dict.fromkeys(a, b)
print(dictt)

Answer 1

你想要的是一個以變量名作為鍵的字典，列表的內容連接在一起作為值。

檢索變量名稱並將它們用作鍵是不常見的，因此您可以像這樣手動執行此操作：

a = ["hello","hi"]
b = ["day","night"]

c = {
    'a': ', '.join(a),
    'b': ', '.join(b)
}

print(c) # {'a': 'hello, hi', 'b': 'day, night'}

如果你想遍歷 a 和 b 的分配，我會以不同的方式組織 a 和 b。 所以你可以遍歷它們。 像這樣：

# here are your many lists
data = [
    ["hello","hi"],
    ["day","night"]
]

# here you go over all the lists and use the index as key
c = {}
for i, lst in enumerate(data):
    c[i] = ', '.join(lst)

print(c) # {0: 'hello, hi', 1: 'day, night'}

如果您需要字典鍵是一些字符串，您可以在數據旁邊使用鍵列表：

# define keys
keys = ['a', 'b']

# here are your many lists
data = [
    ["hello","hi"],
    ["day","night"]
]

# here you go over all the lists and use the key for keys
c = {}
for i, lst in enumerate(data):
    c[keys[i]] = ', '.join(lst)

print(c) # {'a': 'hello, hi', 'b': 'day, night'}

如果您想避免使用鍵列表，但確實想要一些字母作為鍵。 您可以通過字母表來查找鍵。 這限於您可以 go 超過的字母數量：

# here are your many lists
data = [
    ["hello","hi"],
    ["day","night"]
]

# here you go over all the lists and use the alphabet letters in order as keys
c = {}
for i, lst in enumerate(data):
    c[chr(i+97)] = ', '.join(lst)

print(c) # {'a': 'hello, hi', 'b': 'day, night'}