What are the examples of using Python

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Python object to JSON object

import json

# a Python object (dict):

python_obj = {

"name": "David",

"class":"I",

"age": 6

}

print(type(python_obj))

Use the json.dumps method to convert to json objects:

# convert into JSON:

j_data = json.dumps(python_obj)

# result is a JSON string:

print(j_data) Format to json

If the dictionary is converted into a json object, ensure that the keys are in order and indented by 4 cells, how to do it?

json.dumps(j_str, sort_keys=True, indent=4)

Examples:

import json

j_str = {'4': 5, '6': 7, '1': 3, '2': 4}

print(json.dumps(j_str, sort_keys=True, indent=4)) Find the top 3 largest or smallest numbers in the list

Use the nlargest method in heapq:

import heapq as hq

nums_list = [25, 35, 22, 85, 14, 65, 75, 22, 58]

# Find three largest values

largest_nums = hq.nlargest(3, nums_list)

print(largest_nums)

Find the minimum number of 3 corresponding to this, using the nsmallest method in heapq:

import heapq as hq

nums_list = [25, 35, 22, 85, 14, 65, 75, 22, 58]

smallest_nums = hq.nsmallest(3, nums_list)

print("\nThree smallest numbers are:", smallest_nums) Use heap sort list in ascending order

Using heapq module, first build heap on list, default to small root heap, call len(nums) secondary heappop:

import heapq as hq

nums_list = [18, 14, 10, 9, 8, 7, 9, 3, 2, 4, 1]

hq.heapify(nums_list)

s_result = [hq.heappop(nums_list) for _ in range(len(nums_list))]

print(s_result)

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