add some usage examples for viv

examples/cli.py

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+#!/usr/bin/env python3
+"""
+It can be convenient to quickly generate a cli for a short script.
+Or to add simple visualization of data using the wonderful rich library.
+"""
+
+__import__("viv").activate("typer", "rich-click")  # noqa
+
+import typer
+
+app = typer.Typer()
+
+
+@app.command()
+def hello(name: str):
+    print(f"Hello {name}")
+
+
+@app.command()
+def goodbye(name: str, formal: bool = False):
+    if formal:
+        print(f"Goodbye Ms. {name}. Have a good day.")
+    else:
+        print(f"Bye {name}!")
+
+
+if __name__ == "__main__":
+    app()

examples/exe_specific.py

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+#!/usr/bin/env python3
+"""
+This script will generate a vivenv that is executable specific.
+This means if it is run using a different python version or executable
+it will generate a new vivenv.
+
+It may be important to require a exe specificty if you are frequently running
+different version of pythons and rely on c extension modules as in numpy.
+"""
+
+__import__("viv").activate("numpy", "termplotlib", track_exe=True)
+
+import numpy as np
+import termplotlib as tpl
+
+x = np.linspace(0, 2 * np.pi, 10)
+y = np.sin(x)
+
+fig = tpl.figure()
+fig.plot(x, y, label="data", width=50, height=15)
+fig.show()

examples/frozen_import.py

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+#!/usr/bin/env python3
+"""
+This import statement was generated using
+`viv freeze pandas tabulate` on 2022.12.19
+
+Using viv freeze ensures future runs of this
+script will use the same essential environment
+"""
+__import__("viv").activate(
+    "numpy==1.24.0",
+    "pandas==1.5.2",
+    "python-dateutil==2.8.2",
+    "pytz==2022.7",
+    "six==1.16.0",
+    "tabulate==0.9.0",
+)  # noqa
+
+import pandas as pd
+
+df = pd.DataFrame({"x": range(10), "y": range(10)})
+
+print(df.to_markdown())

examples/named_env.py

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+#!/usr/bin/env python3
+"""
+# Viv env is named
+
+Meaning that it will save it within the viv cache not using a hash.
+
+*This environment could then be reused by specifying the name*
+"""
+
+__import__("viv").activate("rich", name="rich-env")
+
+from rich.console import Console
+from rich.markdown import Markdown
+
+console = Console()
+md = Markdown(__doc__)
+console.print(md)

examples/scrape.py

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+#!/usr/bin/env python3
+"""A Simple Script for Extracting Data from a Webpage
+This script allows the user to extract data from a webapge
+and then export the data to a csv file with column(s).
+modified from:
+https://medium.com/analytics-vidhya/a-super-easy-python-script-for-web-scraping-that-anybody-can-use-d3bd6ab86c89
+"""
+
+__import__("viv").activate("requests", "bs4", "rich")  # noqa
+
+import requests
+from bs4 import BeautifulSoup
+from rich import box
+from rich.console import Console
+from rich.table import Table
+
+# Put your URL here
+url = "https://www.nytimes.com/books/best-sellers/combined-print-and-e-book-nonfiction/"
+
+# Fetching the html
+r = requests.get(url)
+
+# Parsing the html
+parse = BeautifulSoup(r.content, "html.parser")
+
+# Provide html elements' attributes to extract the data
+text1 = list(
+    e.get_text().strip() for e in parse.find_all("h3", attrs={"class": "css-5pe77f"})
+)
+text2 = list(
+    e.get_text().strip().replace("by ", "")
+    for e in parse.find_all("p", attrs={"class": "css-hjukut"})
+)
+max_len = max((len(txt) for txt in text1))
+
+print()
+table = Table(title="NY Times Best Sellers", box=box.ROUNDED, title_justify="left")
+table.add_column(
+    "Title",
+    justify="right",
+    style="cyan",
+    no_wrap=True,
+)
+table.add_column("Author", style="magenta")
+
+for col1, col2 in zip(text1, text2):
+    table.add_row(col1, col2)
+
+console = Console()
+console.print(table)

examples/sys_path.py

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+#!/usr/bin/env python3
+"""
+Embed the viv.py on the sys.path at runtime rather than using PYTHONPATH
+"""
+
+
+__import__("sys").path.append(
+    __import__("os").path.expanduser("~/.viv/src")
+)  # noqa # isort: off
+__import__("viv").activate("pyfiglet")  # noqa # isort: off
+
+import sys
+
+from pyfiglet import Figlet
+
+f = Figlet(font="slant")
+print(f.renderText("Viv isn't venv!"))
+
+print("Sys path:")
+print("\n".join(sys.path))

examples/wrong_input.py

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+#!/usr/bin/env python3
+
+# ints are not allowed
+__import__("viv").activate(5)