Python 第194-196 个小例子

import json
# a Python object (dict):
python_obj = {
  "name": "David",
  "class":"I",
  "age": 6  
}
print(type(python_obj))

# convert into JSON:
j_data = json.dumps(python_obj)

# result is a JSON string:
print(j_data)

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

import json
j_str = {'4': 5, '6': 7, '1': 3, '2': 4}
print(json.dumps(j_str, sort_keys=True, indent=4))

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)

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)

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)