range

问题 for java, we can do: for(int i=100; i>2 ; i=i/2){things to execute} but what if in python? is there anything like for i in range(100:2:something) could solve this problem? 回答1: If you need something simple which you can have at hand at several places, you can create a generator function: def range_divide(start, end, denominator): # TODO: Think for a better name! value = start while value > end: yield value value /= denominator and then do for value in range_divide(100, 2, 2): # do_stuff You

问题 for java, we can do: for(int i=100; i>2 ; i=i/2){things to execute} but what if in python? is there anything like for i in range(100:2:something) could solve this problem? 回答1: If you need something simple which you can have at hand at several places, you can create a generator function: def range_divide(start, end, denominator): # TODO: Think for a better name! value = start while value > end: yield value value /= denominator and then do for value in range_divide(100, 2, 2): # do_stuff You

问题 This question already has answers here : Golang Reusing Memory Address Copying from slice? (2 answers) Closed 3 years ago . type student struct { Name string Age int } func main() { m := make(map[string]*student) s := []student{ {Name: "Allen", Age: 24}, {Name: "Tom", Age: 23}, } for _, stu := range s { m[stu.Name] = &stu } fmt.Println(m) for key, value := range m { fmt.Println(key, value) } } result: map[Allen:0xc42006a0c0 Tom:0xc42006a0c0] Allen &{Tom 23} Tom &{Tom 23} How to explain Slice

问题 This question already has answers here : Golang Reusing Memory Address Copying from slice? (2 answers) Closed 3 years ago . type student struct { Name string Age int } func main() { m := make(map[string]*student) s := []student{ {Name: "Allen", Age: 24}, {Name: "Tom", Age: 23}, } for _, stu := range s { m[stu.Name] = &stu } fmt.Println(m) for key, value := range m { fmt.Println(key, value) } } result: map[Allen:0xc42006a0c0 Tom:0xc42006a0c0] Allen &{Tom 23} Tom &{Tom 23} How to explain Slice

问题 I'm trying take a .txt file populated by 88 rows, each of which has two characters separated by a space, copy the first character in each row into a list #1, copy the second character of each list into a list #2 and then populate a dictionary with those two lists. Something, however, is going wrong when I try to copy down the data from the file into my lists. Could you tell me what I'm not doing correctly? I keep getting this error: "IndexError: string index out of range" at the line where I

问题 First of all this is the first time I am creating a macro using VBA code. With some bits and pieces i found on the internet I tried to create the following. I am not a developer at all, I just have some basic knowledge from school. So my apologies if this is poor coding. I am creating a macro in word which highlights text from a paragraph heading until the next heading with the same style. This is done based on a list of headings I import from Excel. You can find the code I have created below

问题 Have two simple 20 line text files. Current script below only reads line 20 in both, runs main 'context_input' process without errors, then exits. Need to apply same process to all lines 1-20. Same result if using counter with import sys. Requirement is to read strings not create a list. readlines() will cause errors. Any code snippets for setting a proper loop to accomplish this are appreciated. # coding=utf-8 from src.model_use import TextGeneration from src.utils import DEFAULT_DECODING

问题 Have two simple 20 line text files. Current script below only reads line 20 in both, runs main 'context_input' process without errors, then exits. Need to apply same process to all lines 1-20. Same result if using counter with import sys. Requirement is to read strings not create a list. readlines() will cause errors. Any code snippets for setting a proper loop to accomplish this are appreciated. # coding=utf-8 from src.model_use import TextGeneration from src.utils import DEFAULT_DECODING

问题 I have a problem with my IDE in python... I want to make a list of numbers i.e (40,000,000) but when i place this command list(range(1000000)) it counted up to that no problem but i tried scrolling down to the start of the code and i noticed that it started from 999000 instead of 1 so i tried this instead list(range(1, 1000000)) but it still didn't work out as it should. So what the IDE is actually doing is that if it gets to the maximum capacity, it dumps previous information for new ones.

问题 As we know that the range of char is -128 to 127 . The 2's compliment of -128 and the binary of 128 is same, which is 10000000 So why the range of char is -128 to 127 but not -127 to 128 . Where as in case of int , 128 and -128 both are different. 回答1: In twos-complement notation, whenever the high-order bit is 1, the number is negative. So the biggest positive number is 01111111 = 127 and the smallest negative number is 10000000 = -128 The same thing happens for int , but its range is much