formatting

问题 I am learning flask and building a app based on Corey Schafer's Youtube tutorials. I'm using VS-Code as my editor of choice. In tutorial 5 he splits his app into a package structure and when I do it I run into a problem. In my settings I enabled the "editor.formatOnSave": true and the formatter I use is autopep8. Now when I move one of my import statements from the top to the bottom of my file and save, the formatter moves it back to the top. I'm guessing its because of 'E402 - Fix module

问题 I have encountered problem of converting float to string where to_string is too slow for me as my data might involves few millions floats. I already have solution on how to write those data out fast. However, after solving that problem, I soon realized that the conversion of float to string is leaving a big impact. So, is there any ideas or solution for this other than using other non standard library? 回答1: An optimization that comes in mind is to not directly use to_string, which creates a

问题 I have encountered problem of converting float to string where to_string is too slow for me as my data might involves few millions floats. I already have solution on how to write those data out fast. However, after solving that problem, I soon realized that the conversion of float to string is leaving a big impact. So, is there any ideas or solution for this other than using other non standard library? 回答1: An optimization that comes in mind is to not directly use to_string, which creates a

问题 I've been looking for a PowerShell script similar to examples found in .NET examples. To take a New-TimeSpan and display is at 1 day, 2 hours, 3 minutes, 4 seconds. Exclude where its zero, add plural "s" where needed. Anybody have that handy? This is as far as I got: $StartDate = (Get-Date).ToString("M/dd/yyyy h:mm:ss tt") Write-Host "Start Time: $StartDate" # Do Something $EndDate = (Get-Date).ToString("M/dd/yyyy h:mm:ss tt") Write-Host "End Time: $EndDate" -ForegroundColor Cyan $Duration =

问题 I've been looking for a PowerShell script similar to examples found in .NET examples. To take a New-TimeSpan and display is at 1 day, 2 hours, 3 minutes, 4 seconds. Exclude where its zero, add plural "s" where needed. Anybody have that handy? This is as far as I got: $StartDate = (Get-Date).ToString("M/dd/yyyy h:mm:ss tt") Write-Host "Start Time: $StartDate" # Do Something $EndDate = (Get-Date).ToString("M/dd/yyyy h:mm:ss tt") Write-Host "End Time: $EndDate" -ForegroundColor Cyan $Duration =

问题 I'm summarizing data and creating a table within a Shiny application. My basic problem is that I would like to add some additional spaces in between elements in a concatenated string so that it is more readable, but the spaces added seem to disappear. I think that the paste() function is appropriately adding the extra space around the "+/-" symbol, but that using either kable or kableExtra to create a table deletes the spaces. I think I'm asking the same question as this person did, but that

问题 I'm summarizing data and creating a table within a Shiny application. My basic problem is that I would like to add some additional spaces in between elements in a concatenated string so that it is more readable, but the spaces added seem to disappear. I think that the paste() function is appropriately adding the extra space around the "+/-" symbol, but that using either kable or kableExtra to create a table deletes the spaces. I think I'm asking the same question as this person did, but that

问题 So I was wondering if there was a way to parameterize the format operator For example >>> '{:.4f}'.format(round(1.23456789, 4)) '1.2346 However, is there anyway to do something like this instead >>> x = 4 >>> '{:.xf}'.format(round(1.23456789, x)) '1.2346 回答1: Yes, this is possible with a little bit of string concatenation . Check out the code below: >>> x = 4 >>> string = '{:.' + str(x) + 'f}' # concatenate the string value of x >>> string # you can see that string is the same as '{:.4f}' '{:

问题 So I was wondering if there was a way to parameterize the format operator For example >>> '{:.4f}'.format(round(1.23456789, 4)) '1.2346 However, is there anyway to do something like this instead >>> x = 4 >>> '{:.xf}'.format(round(1.23456789, x)) '1.2346 回答1: Yes, this is possible with a little bit of string concatenation . Check out the code below: >>> x = 4 >>> string = '{:.' + str(x) + 'f}' # concatenate the string value of x >>> string # you can see that string is the same as '{:.4f}' '{:

问题 So I was wondering if there was a way to parameterize the format operator For example >>> '{:.4f}'.format(round(1.23456789, 4)) '1.2346 However, is there anyway to do something like this instead >>> x = 4 >>> '{:.xf}'.format(round(1.23456789, x)) '1.2346 回答1: Yes, this is possible with a little bit of string concatenation . Check out the code below: >>> x = 4 >>> string = '{:.' + str(x) + 'f}' # concatenate the string value of x >>> string # you can see that string is the same as '{:.4f}' '{: