建立 DataFrame

使用 pandas 進行資料操作

Maggie Matsui

Senior Content Developer at DataCamp

字典（dictionary）

my_dict = {
    "key1": value1,
    "key2": value2,
    "key3": value3
}

my_dict["key1"]

value1

my_dict = {
    "title": "Charlotte's Web",
    "author": "E.B. White",
    "published": 1952
}

my_dict["title"]

Charlotte's Web

建立 DataFrame

從字典清單建立

逐列建立

方括號內有多個字典，表示字典清單。

從清單字典建立

逐欄建立

一個字典中包含多組方括號，表示清單字典。

字典清單－依列

name	breed	height (cm)	weight (kg)	date of birth
Ginger	Dachshund	22	10	2019-03-14
Scout	Dalmatian	59	25	2019-05-09

list_of_dicts = [

    {"name": "Ginger", "breed": "Dachshund", "height_cm": 22,
    "weight_kg": 10, "date_of_birth": "2019-03-14"},

    {"name": "Scout", "breed": "Dalmatian", "height_cm": 59, 
    "weight_kg": 25, "date_of_birth": "2019-05-09"}

]

字典清單－依列

name	breed	height (cm)	weight (kg)	date of birth
Ginger	Dachshund	22	10	2019-03-14
Scout	Dalmatian	59	25	2019-05-09

new_dogs = pd.DataFrame(list_of_dicts)
print(new_dogs)

     name      breed  height_cm  weight_kg date_of_birth
0  Ginger  Dachshund         22         10    2019-03-14
1   Scout  Dalmatian         59         25    2019-05-09

清單字典－依欄

name	breed	height	weight	date of birth
Ginger	Dachshund	22	10	2019-03-14
Scout	Dalmatian	59	25	2019-05-09

「Key」＝欄名
「Value」＝該欄的值清單

dict_of_lists = {

    "name": ["Ginger", "Scout"],

    "breed": ["Dachshund", "Dalmatian"],

    "height_cm": [22, 59],

    "weight_kg": [10, 25],

    "date_of_birth": ["2019-03-14", 
    "2019-05-09"]

}

new_dogs = pd.DataFrame(dict_of_lists)

清單字典－依欄

name	breed	height (cm)	weight (kg)	date of birth
Ginger	Dachshund	22	10	2019-03-14
Scout	Dalmatian	59	25	2019-05-09

print(new_dogs)

     name      breed  height_cm  weight_kg date_of_birth
0  Ginger  Dachshund         22         10    2019-03-14
1   Scout  Dalmatian         59         25    2019-05-09

一起來練習吧！

使用 pandas 進行資料操作