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1. Enumeration - enumerate can have parameters We did this before: i = 0for item in iterable: print i, item i += 1 Now let's do this: for i, item in enumerate(iterable): print i, item The enumerate function also receives the second parameter. As follows: >>> list(enumerate('abc')) [(0, 'a'), (1, 'b'), (2, 'c')] >>> list(en ...

Defining variables Parameter Expression is used to create variable and variable parameter expressions. In C #, variables are divided into the following types: Value types Reference types Pointer types Generally, only value types and reference types are used, and pointer types are not mentioned here. The basic value types of C # are bool, byte ...

I. Preface Originally, this article was written when we need to use it later, but since we write about the expansion of expressions, we should finish it together. Looking at this heading, there is a question: Lambda expression is an expression tree, how do we extend it? Look at the following and you will see. Expressions Series Directory C# ...

Processes and threads A process is an instance of a program running. A process can contain multiple threads, so all resources in a thread can be shared among multiple threads in the same process, which is the basic unit of the dynamic operation of the operating system; each thread is an instance of the process, which can be scheduled and run in ...

function actual combat #include <iostream> int myAdd(int,int); int main() { int x=10; int y=20; std::cout<<x<<"+"<<y<<"="<<myAdd(x,y)<<std::endl; return 0; } int myAdd(int x,int y) { ...

House price forecasting is an introductory competition on kaggle. Generally speaking, it gives you 79 features about house price, and then predicts house price according to the characteristics. The evaluation index of housing price forecast is root ...

Mask-Rcnn Data Annotation Detailed Tutorial (labelme version) abstract 1. Data Set Making 1. Installation and use of labelme 2. Tagging Pictures and Batch Conversion abstract Hello! Starting with data annotation, this paper will elaborate o ...

Downstairs of an office building on Dawang Road. Ape A: When we worked in our company, we ran a lot of data processing tasks in the middle of the night, and then the program often crashed. Me: Oh? How to deal with that? Ape A: There was some water in the architecture at that time. It said that we should adjust the ratio of "Eden" to ...

When using Python for data analysis, we often look at the distribution of a data, and then process the data. For example, there is a scene: The following data are pre-scheduled dates for a product: import pandas as pd import seaborn as sns impo ...

1. Initial Identity Function 1.1 What is a function? < 1 > Encapsulating a function into a space is a function < 2 > Reduce duplicate code 1.2 Define Functions Def -- Keyword in Python () -- Format requirements must be written :--End of statement def len(): Function Body def my_len(): n = 0 for i in dic: ...