Python code snippets3/20/2023 ![]() ![]() The code below counts the number of rows in a text file, by passing the filename as argument to the script rowcount.py in the command line. However, for larger files this can be a bit tedious, especially where the row count of multiple files needs to be checked. For smaller files, this can be easily determined by opening the file in a text editor. When extracting data from an external system, it is common to count the number of rows in the extracted data to see if it matches with the expected export result. # only write non-blank lines and make line endings consistent # list of files to concatenate in order of concat The code below takes in a list of files to the infile variable and concatenates them in the order that they appear in the list, removing blank rows in the process and writing to the filename specified by the outfile variable: # name of output files For example, CSV files spanning a number of files, that would make more sense to work with as a single source data file. It often happens that I have a number of text files with the same layout structure that I need to consolidate into a single file. Let’s have a look at a few helpful code snippets for working with basic text files: Concatenating files But what if we need to perform some tasks with our raw data files or directories before we import the data into Excel or a data analytics application? ![]() In a previous post, I covered some basic examples of interacting with excel using python. A better way to deal with opening a file, is to use the with context manager, which always safely closes the file. file = "file-1.csv"Ī problem with the above code, is that any error in working with the file, might exit the Python script before the file can be safely closed. For example, the below code opens a file called “file-1.csv”, reads and prints the contents of the file to screen and then closes. Various operations can then be performed on the file, before the file is then closed. Most of the code snippets in this post use a few simple bits of code together with the humble Python open built-in function, which requires two parameters, namely the file name and the mode for opening the file. In this post, I will share five Python code snippets for working with files that I often use to help simplify common tasks and save time. Data science and analysis-Code snippets that can be implemented in your data science and analysis workflows using ArcGIS API for Python, ArcPy, and other Python libraries.We all have those annoying and tedious little tasks in our everyday workflows that seem to crop up over and over again. I often find myself needing to verify the integrity of files or wrangling data obtained from various different systems and in multiple formats.Unzip a file to the workspace directory. ![]() Remove a folder in the workspace directory.Remove a file geodatabase in the workspace directory.Download a file item from portal to the workspace directory.Create a folder in the workspace directory.Create a file geodatabase with an empty feature class.Copy a geodatabase in the workspace directory.Content management-Code snippets that help in managing the content in your GIS and the files in your notebook workspace directory.Query portal logs and save as CSV ( ArcGIS Enterprise only).Get the base service URL of a layer item.Check the credits of a specific user ( ArcGIS Online only).Check remaining credits ( ArcGIS Online only).Many of these code snippets require an administrator connection. GIS administration-Code snippets that perform common GIS administration tasks.The following are available code snippets that can be inserted into your notebook: A code snippet can also be edited once it has been added to your notebook. The code snippets are written as Python functions that can be inserted into your notebook and called throughout it. These curated code snippets allow you to implement common GIS workflows in your notebooks. # call the code snippet function with your GIS instanceĬheck_org_credits_agol(gis_agol) Esri code snippetsĪll available code snippets are curated by Esri. # create a GIS instance to pass to the code snippet function Print("Please connect to the ArcGIS Online organization as an administrator to check credits.") Print(f"This ArcGIS Online organization has credits.") # curated code snippet inserted from the Code snippets pane ![]()
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