Hướng dẫn how do i add an ordereddict in python? - làm cách nào để thêm một lệnh trong python?

Cải thiện bài viết

Lưu bài viết

Cải thiện bài viết

Lưu bài viết

ĐọcOrderedDict is a dictionary subclass that remembers the order that keys were first inserted. The only difference between dict() and OrderedDict() is that:

Bàn luậnpreserves the order in which the keys are inserted. A regular dict doesn’t track the insertion order and iterating it gives the values in an arbitrary order. By contrast, the order the items are inserted is remembered by OrderedDict.

Python3

Một đơn đặt hàng là một lớp con từ điển nhớ rằng thứ tự mà các khóa được chèn lần đầu tiên. Sự khác biệt duy nhất giữa dict () và stromeddict () là:

print("This is a Dict:\n"

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Đặt hàng bảo tồn thứ tự trong đó các khóa được chèn. Một chế độ thường xuyên không theo dõi thứ tự chèn và lặp lại nó đưa ra các giá trị theo thứ tự tùy ý. Ngược lại, thứ tự các mục được chèn được ghi nhớ bằng cách đặt hàng.

from collections import OrderedDict

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

print(collections 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

from4 from5from6 from7

collections 5

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

Output: 

This is a Dict:
a 1
c 3
b 2
d 4

This is an Ordered Dict:
a 1
b 2
c 3
d 4

collections 8from0

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

from4 from5from6 print1If the value of a certain key is changed, the position of the key remains unchanged in OrderedDict.

Python3

Một đơn đặt hàng là một lớp con từ điển nhớ rằng thứ tự mà các khóa được chèn lần đầu tiên. Sự khác biệt duy nhất giữa dict () và stromeddict () là:

print((1

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

from4 from5from6 from7

collections 5

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

print(

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8from0

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8from0

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Output: 

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

from4 from5from6 print1: Deleting and re-inserting the same key will push it to the back as OrderedDict, however, maintains the order of insertion.

Python3

Một đơn đặt hàng là một lớp con từ điển nhớ rằng thứ tự mà các khóa được chèn lần đầu tiên. Sự khác biệt duy nhất giữa dict () và stromeddict () là:

print(

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

from4 from5from6 from7

collections 5

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

print(

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

print(

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

from8printcollections 0

Output: 

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8from0

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

• from4 from5from6 print1
• Điểm quan trọng: & NBSP;
• 1

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

collections 8

Before deleting:

a 1
b 2
c 3
d 4

After deleting:

a 1
b 2
d 4

After re-inserting:

a 1
b 2
d 4
c 3

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4

Before:

a 1
b 2
c 3
d 4

After:

a 1
b 2
c 5
d 4