Python Flask 开发 - Flask 路径参数类型(string、int、float、path、uuid)
2026/7/10 9:08:13 网站建设 项目流程

查看路径参数类型

forconverter_name,converter_classinapp.url_map.converters.items():print(f"{converter_name}:{converter_class}")
# 输出结果 default: <class 'werkzeug.routing.converters.UnicodeConverter'> string: <class 'werkzeug.routing.converters.UnicodeConverter'> any: <class 'werkzeug.routing.converters.AnyConverter'> path: <class 'werkzeug.routing.converters.PathConverter'> int: <class 'werkzeug.routing.converters.IntegerConverter'> float: <class 'werkzeug.routing.converters.FloatConverter'> uuid: <class 'werkzeug.routing.converters.UUIDConverter'>

一、string

@app.route('/user/<string:username>')defshow_string(username):returnf'type: string, value:{username}, python_type:{type(username).__name__}'
  1. 测试/user/john_doe
# 输出结果 type: string, value: john_doe, python_type: str
  1. 测试/user/123
# 输出结果 type: string, value: 123, python_type: str
  1. 测试/user/john%20doe
# 输出结果 type: string, value: john doe, python_type: str

二、int

@app.route('/article/<int:article_id>')defshow_int(article_id):returnf'type: int, value:{article_id}, python_type:{type(article_id).__name__}'
  1. 测试/article/42
# 输出结果 type: int, value: 42, python_type: int
  1. 测试/article/0
# 输出结果 type: int, value: 0, python_type: int
  1. 测试/article/-100
# 输出结果 Not Found
  1. 测试/article/3.14
# 输出结果 Not Found
  1. 测试/article/abc
# 输出结果 Not Found
  1. 测试/article/10abc
# 输出结果 Not Found

三、float

@app.route('/price/<float:price>')defshow_float(price):returnf'type: float, value:{price}, python_type:{type(price).__name__}'
  1. 测试/price/19.99
# 输出结果 type: float, value: 19.99, python_type: float
  1. 测试/price/-5.5
# 输出结果 Not Found
  1. 测试/price/100
# 输出结果 Not Found
  1. 测试/price/100.0
# 输出结果 type: float, value: 100.0, python_type: float
  1. 测试/price/.5
# 输出结果 Not Found
  1. 测试/price/3.1415926
# 输出结果 type: float, value: 3.1415926, python_type: float
  1. 测试/price/10,5
# 输出结果 Not Found
  1. 测试/price/10k
# 输出结果 Not Found
  1. 测试/price/abc
# 输出结果 Not Found

四、path

1、演示
@app.route('/path/<path:filepath>')defshow_path(filepath):returnf'type: path, value:{filepath}, python_type:{type(filepath).__name__}'
  1. 测试/path/docs
# 输出结果 type: path, value: docs, python_type: str
  1. 测试/path/docs/api
# 输出结果 type: path, value: docs/api, python_type: str
  1. 测试/path/docs/api/v1
# 输出结果 type: path, value: docs/api/v1, python_type: str
  1. 测试/path/static/css/style.css
# 输出结果 type: path, value: static/css/style.css, python_type: str
  1. 测试/path/a/b/../d
# 输出结果 type: path, value: a/b/../d, python_type: str
2、string 处理路径类型的问题
@app.route('/path/<string:filepath>')defshow_path(filepath):returnf'type: string, value:{filepath}, python_type:{type(filepath).__name__}'
  1. 测试/path/docs
# 输出结果 type: string, value: docs, python_type: str
  1. 测试/path/docs/api
# 输出结果 Not Found
  1. 测试/path/docs/api/v1
# 输出结果 Not Found
  1. 测试/path/static/css/style.css
# 输出结果 Not Found
  1. 测试/path/a/b/../d
# 输出结果 Not Found

五、uuid

@app.route('/resource/<uuid:resource_id>')defshow_uuid(resource_id):returnf'type: uuid, value:{resource_id}, python_type:{type(resource_id).__name__}'
  1. 测试/resource/123e4567-e89b-12d3-a456-426614174000
# 输出结果 type: uuid, value: 123e4567-e89b-12d3-a456-426614174000, python_type: UUID
  1. 测试/resource/550e8400-e29b-41d4-a716-446655440000
# 输出结果 type: uuid, value: 550e8400-e29b-41d4-a716-446655440000, python_type: UUID
  1. 测试/resource/not-a-uuid
# 输出结果 Not Found
  1. 测试/resource/123
# 输出结果 Not Found
  1. 测试/resource/123e4567-e89b-12d3-a456-42661417400(短了)
# 输出结果 Not Found
  1. 测试/resource/123e4567-e89b-12d3-a456-4266141740000(长了)
# 输出结果 Not Found

需要专业的网站建设服务?

联系我们获取免费的网站建设咨询和方案报价,让我们帮助您实现业务目标

立即咨询