feat(python): add term entry for 'with' keyword with syntax, examples…

content/python/concepts/keywords/terms/with/with.md

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+---
+Title: 'with'
+Description: 'Simplifies resource management by automatically handling setup and teardown actions using context managers.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Files'
+  - 'Python'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/computer-science'
+---
+
+The **`with`** keyword in Python is used to wrap the execution of a block of code within methods defined by a context manager. It simplifies resource management — automatically handling setup and teardown operations like opening and closing files, acquiring and releasing locks, or connecting and disconnecting from databases.
+
+When a block under `with` is executed:
+
+1. The context manager’s `__enter__()` method is called.
+2. The block of code inside the `with` statement runs.
+3. The context manager’s `__exit__()` method is automatically called after the block finishes — even if an error occurs.
+
+## Syntax
+
+```pseudo
+with expression [as variable]:
+  # Code block
+```
+
+**Parameters:**
+
+- `expression`: A context manager that defines `__enter__()` and `__exit__()` methods.
+- `variable` (optional): The object returned by the `__enter__()` method, which can be used inside the code block.
+
+**Return value:**
+
+Returns the object provided by the context manager’s `__enter__()` method, if assigned using `as`.
+
+## Example 1: Managing File Resources
+
+In this example, a file is opened, written to, and automatically closed after the block finishes:
+
+```py
+with open("example.txt", "w") as file:
+  file.write("Hello, World!")
+```
+
+The output of this code is:
+
+```shell
+# (No visible output)
+# The file 'example.txt' is written and automatically closed.
+```
+
+Here the file is automatically opened and closed using `with`. Even if an error occurs while writing, `file.close()` is called automatically.
+
+## Example 2: Using Multiple Context Managers
+
+In this example, two files are managed simultaneously, ensuring both are safely opened and closed:
+
+```py
+with open("input.txt", "r") as infile, open("output.txt", "w") as outfile:
+  data = infile.read()
+  outfile.write(data)
+```
+
+In this example, both files are safely managed, opened at the start, and closed automatically when the block ends.
+
+## Example 3: File Handling with `with`
+
+In this example, data is written to a file and then read back using separate `with` blocks for writing and reading:
+
+```py
+# Writing to a file using 'with'
+with open("demo.txt", "w") as file:
+  file.write("Learning Python 'with' keyword!")
+
+# Reading the same file
+with open("demo.txt", "r") as file:
+  content = file.read()
+print(content)
+```
+
+The expected output is:
+
+```shell
+Learning Python 'with' keyword!
+```