typing

HDU 2577 How to Type

由 浪子不回头ぞ 提交于 2020-03-14 06:15:30
Problem Description Pirates have finished developing the typing software. He called Cathy to test his typing software. She is good at thinking. After testing for several days, she finds that if she types a string by some ways, she will type the key at least. But she has a bad habit that if the caps lock is on, she must turn off it, after she finishes typing. Now she wants to know the smallest times of typing the key to finish typing a string. Input The first line is an integer t (t<=100), which is the number of test case in the input file. For each test case, there is only one string which

动（静）态类型定义语言、强（弱）类型语言 英文解释

由 浪子不回头ぞ 提交于 2020-03-05 04:37:18
Typed versus untyped languages A language is typed if the specification of every operation defines types of data to which the operation is applicable, with the implication that it is not applicable to other types. For example, " this text between the quotes " is a string. In most programming languages, dividing a number by a string has no meaning. Most modern programming languages will therefore reject any program attempting to perform such an operation. In some languages, the meaningless operation will be detected when the program is compiled ("static" type checking), and rejected by the

How to Type

由 只愿长相守 提交于 2020-03-03 02:17:00
How to Type Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 868 Accepted Submission(s): 373 Problem Description Pirates have finished developing the typing software. He called Cathy to test his typing software. She is good at thinking. After testing for several days, she finds that if she types a string by some ways, she will type the key at least. But she has a bad habit that if the caps lock is on, she must turn off it, after she finishes typing. Now she wants to know the smallest times of typing the key to finish typing a string. Input

How to Type

由 穿精又带淫゛_ 提交于 2020-02-27 06:07:00
Problem Description Pirates have finished developing the typing software. He called Cathy to test his typing software. She is good at thinking. After testing for several days, she finds that if she types a string by some ways, she will type the key at least. But she has a bad habit that if the caps lock is on, she must turn off it, after she finishes typing. Now she wants to know the smallest times of typing the key to finish typing a string. Input The first line is an integer t (t<=100), which is the number of test case in the input file. For each test case, there is only one string which

TypedDict when keys have non alphanumeric characters

由 拈花ヽ惹草 提交于 2020-02-22 08:05:37
问题 If I have a key in a dictonary, such as A(2) . How can I create a TypedDict with this field? E.g from typing import TypedDict class RandomAlphabet(TypedDict): A(2): str is not valid Python code, resulting in the error: SyntaxError: illegal target for annotation 回答1: According to PEP 589 you can use alternative syntax to create a TypedDict as follows: Movie = TypedDict('Movie', {'name': str, 'year': int}) So, in your case, you could write: from typing import TypedDict RandomAlphabet =

Pythonic type hints with pandas?

由 泄露秘密 提交于 2020-02-17 06:56:07
问题 Let's take a simple function that takes a str and returns a dataframe: import pandas as pd def csv_to_df(path): return pd.read_csv(path, skiprows=1, sep='\t', comment='#') What is the recommended pythonic way of adding type hints to this function? If I ask python for the type of a DataFrame it returns pandas.core.frame.DataFrame . The following won't work though, as it'll tell me that pandas is not defined. def csv_to_df(path: str) -> pandas.core.frame.DataFrame: return pd.read_csv(path,

Recursive type annotations

由 喜夏-厌秋 提交于 2020-02-15 06:37:09
问题 I'm trying to introduce static type annotations to my codebase where applicable. One case is when reading a JSON, the resulting object will be a dictionary keyed by strings, with values of one of the following types: bool str float int list dict However the list and dict above can contain that same sort of dictionary, leading to a recursive definition. Is this representable in Python3's type structure? 回答1: As of mypy 0.641, mypy doesn't support the sort of recursive type annotation you're

Recursive type annotations

由 我只是一个虾纸丫 提交于 2020-02-15 06:35:07
问题 I'm trying to introduce static type annotations to my codebase where applicable. One case is when reading a JSON, the resulting object will be a dictionary keyed by strings, with values of one of the following types: bool str float int list dict However the list and dict above can contain that same sort of dictionary, leading to a recursive definition. Is this representable in Python3's type structure? 回答1: As of mypy 0.641, mypy doesn't support the sort of recursive type annotation you're

js实现打字效果

由 此生再无相见时 提交于 2020-01-31 02:46:05
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset='utf-8'> 5 <title>js typing</title> 6 </head> 7 <body> 8 <div id='divTyping'></div> 9 <script> 10 var str = 'js 实现的 打字效果，感觉蛮有趣的。'; 11 var i = 0; 12 function typing(){ 13 var divTyping = document.getElementById('divTyping'); 14 if (i <= str.length) { 15 divTyping.innerHTML = str.slice(0, i++) + '_'; 16 setTimeout('typing()', 200);//递归调用 17 } 18 else{ 19 divTyping.innerHTML = str;//结束打字,移除 _ 光标 20 } 21 } 22 typing(); 23 </script> 24 </body> 25 </html> 代码很容易懂，原来也没有想象的那么难 来源： https://www.cnblogs.com/2YSP/p/9239817.html

Exclude type in Python typing annotation

由 旧时模样 提交于 2020-01-30 05:44:18
问题 I wrote the following function: def _clean_dict(d): return {k: v for k, v in d.items() if v is not None} I want to add type annotations to the function: def _clean_dict(d: Dict[Any, Any]) -> Dict[Any, Any]: return {k: v for k, v in d.items() if v is not None} However, I want to explicitly define that the values inside the returned dictionary cannot be None. Is there a way to say " Any type, except NoneType " or "Every possible value but None "? 回答1: Python type hinting can't exclude types.
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