Add string manipulation notebook

Python/Phase1/string-manipulation.py

@@ -0,0 +1,179 @@
+# /// script
+# requires-python = ">=3.10"
+# dependencies = [
+#     "marimo",
+# ]
+# ///
+
+import marimo
+
+__generated_with = "0.10.12"
+app = marimo.App(width="columns")
+
+
+@app.cell(column=0)
+def _():
+    import marimo as mo
+    return (mo,)
+
+
+@app.cell(hide_code=True)
+def _(mo):
+    mo.md(
+        """
+        # 🐍 Python Strings: Your First Data Type
+
+        Welcome to your first Python lesson! Today, we'll explore strings - one of Python's fundamental data types.
+
+        ## What are Strings?
+        Strings are sequences of characters - like words, sentences, or any text. In Python, we create strings by 
+        enclosing text in either single (`'`) or double (`"`) quotes.
+
+        ```python
+        greeting = "Hello, Python!"
+        name = 'Alice'
+        ```
+        """
+    )
+    return
+
+
+@app.cell
+def _(input_text):
+    input_text
+    return
+
+
+@app.cell
+def _(mo):
+    input_text = mo.ui.text(
+        value="Hello, World!",
+        placeholder="Type any text here...",
+        label="Create your first string"
+    )
+    return (input_text,)
+
+
+@app.cell
+def _(input_text, mo):
+    mo.md(f"""
+    ### Your String Analysis
+
+    Let's analyze the string you created:
+
+    - Your string: `"{input_text.value}"`
+
+    - Length: `{len(input_text.value)}`
+
+    - First character: `'{input_text.value[0] if input_text.value else ''}'`
+
+    - Last character: `'{input_text.value[-1] if input_text.value else ''}'`
+    """)
+    return
+
+
+@app.cell
+def _(operation):
+    operation
+    return
+
+
+@app.cell
+def _(input_text, mo, operation, result):
+    mo.md(f"""
+    ### String Operation Result
+
+    Original: `{input_text.value}`
+
+    Result: `{result}`
+
+    Python code representation:
+    ```python
+    text = "{input_text.value}"
+    result = text.{operation.selected_key}()
+    print(result)  # {result}
+    ```
+    """)
+    return
+
+
+@app.cell
+def _(mo):
+
+    operation = mo.ui.dropdown(
+        options={
+            "upper": "Convert to UPPERCASE",
+            "lower": "Convert to lowercase",
+            "title": "Convert To Title Case",
+            "strip": "Remove extra spaces"
+        },
+        value="upper",
+        label="Choose a string operation"
+    )
+    return (operation,)
+
+
+@app.cell
+def _(input_text, operation):
+    operations = {
+        "Convert to UPPERCASE": input_text.value.upper(),
+        "Convert to lowercase": input_text.value.lower(),
+        "Convert To Title Case": input_text.value.title(),
+        "Remove extra spaces": input_text.value.strip()
+    }
+
+    result = operations[operation.value]
+    return operations, result
+
+
+@app.cell(hide_code=True)
+def _(mo):
+    slice_text = mo.ui.text(
+        value="Python",
+        placeholder="Enter text to slice",
+        label="Text for slicing"
+    )
+
+    start_idx = mo.ui.number(
+        value=0,
+        start=0,
+        stop=10,
+        label="Start Index"
+    )
+
+    end_idx = mo.ui.number(
+        value=3,
+        start=0,
+        stop=10,
+        label="End Index"
+    )
+    return end_idx, slice_text, start_idx
+
+
+@app.cell(column=1)
+def _(end_idx, slice_text, start_idx):
+    slice_text, start_idx, end_idx
+    return
+
+
+@app.cell
+def _(end_idx, mo, slice_text, start_idx):
+    sliced = slice_text.value[start_idx.value:end_idx.value]
+    mo.md(f"""
+    ### String Slicing
+
+    Text: `{slice_text.value}`
+
+    Slice `[{start_idx.value}:{end_idx.value}]`: `{sliced}`
+
+    ```python
+    text = "{slice_text.value}"
+    slice = text[{start_idx.value}:{end_idx.value}]
+    print(slice)  # {sliced}
+    ```
+    """)
+    return (sliced,)
+
+
+if __name__ == "__main__":
+    app.run()