Initial commit pandas playground

[siddarthpatel]

• add a playground folder
• explore pandas dataframe methods

[siddarthpatel]

@mtsadler-branch can this pr be merged?

[mtsadler-branch]

High-level flow looks good.

Nit-picked the PR for sake of Python exploration

[mtsadler-branch]

It may help with code dryness to leverage click here.

The @click is called a python decorator.

For example, you could have a flag called --command that you pass to a function:

import click

@click.command(help="""Example: python3 playground/my_playground.py --command 'df-read'

Choose one of the following options:
- df-read
- df-iterrows
- df-itertuples
- ...
"""
)
@click.option("--command", default="db-load-read")
def run(command):
      if (command == 'df-read'):
        df = read_data(filename=source_file)
      ...
    elif (command == 'db-load-read'):
        load_file_into_db(source_file, table_name, conn)
        preview_data_in_db(table_name, conn)
    else:
        print("Invalid input detected!!!!")
        with click.Context(command) as ctx:
               click.echo(command.get_help(ctx))

(help message)

[mtsadler-branch]

click should give you ability to do everything from run.sh in the same part of python code where its being passed via sys.argv

try using this line of code in your if name =main block

[mtsadler-branch]

I think itd be easier to maintain this logic with click

[mtsadler-branch]

Suggested change

	def df_iter_rows(df):
	"""(dataframe.iterrows) uses dataframe.iterrows to print first 3 rows in df
	Args:
	df (dataframe): pandas dataframe
	"""
	print('(ITER_ROWS) Printing first 3 rows in the dataframe...')
	for index, row in df.iterrows():
	if index == 3: break
	def df_iter_rows(df, limit=3):
	"""
	Prints the first `limit` rows of a dataframe, leveraging `df.iterrows()`.
	Args:
	df (dataframe): pandas dataframe
	limit (int): number of rows to show [default: 3]
	"""
	print(f'Printing first {limit} rows in the dataframe...')
	for index, row in df.iterrows():
	if index == limit: break

[mtsadler-branch]

You could do something like above to your functions.

limit is the number of rows, setting the default to 3

print(f"my_var is set to {my_var}") is called f-string notation which looks nice in code and allows you to build strings easily.

[mtsadler-branch]

Nit: load -> loads

Google uses descriptive, rather than imperative mood for function descriptions.

[mtsadler-branch]

Cool data