from folder import all python code example

Example 1: python import all files in directory

# Basic syntax:
import glob # Package for Unix-style pathname pattern expansion
import os   # Python operating system interface

directory = '/path/to/directory/with/files/'
# Obtain list of filenames that end in .txt in the directory
all_files = glob.glob(os.path.join(directory, "*.txt"))
# Where os.path.join creates the os-specific path to each file

# Import data however you like. To append data in a single pandas 
# dataframe and a single list, you can do:
your_list = [ ]
for filename in all_files:
    dataframe = pd.read_csv(filename, index_col=None, header=0, sep="\t")
    your_list.append(dataframe)

Example 2: python3 import all files in directory

from inspect import isclass
from pkgutil import iter_modules
from pathlib import Path
from importlib import import_module

# iterate through the modules in the current package
package_dir = Path(__file__).resolve().parent
for (_, module_name, _) in iter_modules([package_dir]):

    # import the module and iterate through its attributes
    module = import_module(f"{__name__}.{module_name}")
    for attribute_name in dir(module):
        attribute = getattr(module, attribute_name)

        if isclass(attribute):            
            # Add the class to this package's variables
            globals()[attribute_name] = attribute