Python小知识
浮点数
注意事项
# 浮点数精度问题
from decimal import Decimal
print(0.1 + 0.1) # 0.2
print(0.1 + 0.2) # 0.30000000000000004
print(Decimal("0.1") + Decimal("0.2")) # 0.3,注意:参数是字符串
jsonpath
提取数据
# pip install jsonpath
from jsonpath import jsonpath
actual = {"data": {"msg": "The verification code is wrong or expired"}, "code": 200}
expected = {"msg": "The verification code is wrong or expired", "code": 200}
for key, value in expected.items():
print(jsonpath(actual, f"$..{key}")) # 以列表展示
print(jsonpath(actual, f"$..{key}")[0])
assert jsonpath(actual, f"$..{key}")[0] == expected[key]
expected = {"$..msg": "The verification code is wrong or expired", "$..code": 200}
for key, value in expected.items():
actual_value = jsonpath(actual, key)[0]
print(actual_value)
assert actual_value == value
数据替换
import json
import string
# 数据替换
old_headers = '{"Authorization": "new token", "uuid": "new uuid"}'
headers = json.loads(old_headers)
headers["Authorization"] = "adifhsjfnaksldf"
headers["uuid"] = "xxx"
print(headers)
# 新的办法
# old_headers = '{"Authorization": "${token}", "uuid": "${uuid}", "a": "b"}'
old_headers = '{"Authorization": "${token}", "uuid": "old uuid", "a": "${b}"}'
new_data = {"token": "my token", "uuid": "my uuid", "b": "new c"}
t = string.Template(old_headers)
new_headers = t.substitute(new_data)
print(new_headers)
# 封装替换数据的函数
def replace_data(old: str, new: dict):
t = string.Template(old)
new_headers = t.substitute(new)
return new_headers
if __name__ == '__main__':
print(replace_data(old_headers, new_data))
old_headers = '{"Authorization": "token", "uuid": "old uuid", "a": "b"}' # 替换的数据为字符串类型
new_data = {}
# 数据替换的用法,如果old_headers没有需要替换的数据,new_data数据为空,得到的new_headers为old_headers数据
t = string.Template(old_headers)
new_headers = t.substitute(new_data)
print(new_headers)
print(type(new_headers)) # 生成的也是字符串类型化
print(json.loads(new_headers)) # 转换成字典类型的数据
print(type(json.loads(new_headers)))
yaml
学习
-
支持的数据类型:字典、列表、字符串、布尔值、整数、浮点数、Null、时间等
-
基本语法规则:
- 大小写敏感
- 使用缩进表示层级关系
- 相同层级的元素左侧对齐
- 键值对用冒号 “:” 结构表示,冒号与值之间需用空格分隔
- 数组前加有 “-” 符号,符号与值之间需用空格分隔
- None值可用null 和 ~ 表示
- 多组数据之间使用3横杠---分割
#
表示注释,但不能在一段代码的行末尾加 #注释,否则会报错
读取yaml
文件
# 注释
# 后面的字符串表示建议带引号
# 冒号后面一定要空格
name: "yu"
name1: yu
age: 26
femail: true
# python中的字典
database: { "host": "http://xxx.com", "port: 3306" }
database1:
host: "http://xxx.com"
port: 3306
# 列表
hobby: [ "music", "电影" ]
hobby1:
- "music"
- "电影"
# pip install pyyaml
import yaml
# 读取yaml
with open("read.yaml", encoding="utf-8") as f:
# print(f.read())
data = yaml.safe_load(f)
print(data, type(data))
# 结果:
# {'name': 'yu', 'name1': 'yu', 'age': 26, 'femail': True, 'database': {'host': 'http://xxx.com', 'port: 3306': None}, 'database1': {'host': 'http://xxx.com', 'port': 3306}, 'hobby': ['music', '电影'], 'hobby1': ['music', '电影']} <class 'dict'>
# pip install pyyaml
import yaml
# 读取yaml
with open("read.yaml", encoding="utf-8") as f:
result = yaml.load(f, Loader=yaml.FullLoader)
print(result, type(result))
# 结果:
# {'name': 'yu', 'name1': 'yu', 'age': 26, 'femail': True, 'database': {'host': 'http://xxx.com', 'port: 3306': None}, 'database1': {'host': 'http://xxx.com', 'port': 3306}, 'hobby': ['music', '电影'], 'hobby1': ['music', '电影']} <class 'dict'>
标签:old,uuid,python,知识,headers,print,new,data
From: https://www.cnblogs.com/HollowPan/p/17663693.html