modwrap 1.1.6

Python module wrapper for dynamic loading and callable signature validation.

modwrap is a pure Python 3 utility (no external dependencies) that lets you dynamically load and execute functions from any Python module. 🐍

📦 Installation

Install directly from PyPI:

pip install modwrap

Could be add to your project using poetry:

poetry add modwrap

🔧 Programmatic Usage

Use modwrap in your Python code to load modules, introspect callable signatures, and execute functions dynamically:

Basic Usage

from modwrap import ModuleWrapper

wrapper = ModuleWrapper("./examples/shell.py")

# Load and call a function
func = wrapper.get_callable("execute")
result = func(command="whoami")
print(result)

# Access the raw module object
mod = wrapper.module
print(mod.execute("whoami"))

Signature Validation

Validate function signatures with type checking:

# Validate with type hints
wrapper.validate_signature("execute", {"command": str, "timeout": float})

# Or use the non-raising version
if wrapper.has_signature("execute", {"command": str}):
    func = wrapper.get_callable("execute")
    result = func(command="ls")

Validate only argument names (no type checking):

# Validate argument names only
wrapper.validate_args("execute", ["command", "timeout"])

# Or use the non-raising version
if wrapper.has_args("execute", ["command", "timeout"]):
    func = wrapper.get_callable("execute")
    result = func(command="ls", timeout=30)

Dependency Analysis

Check what packages need to be installed:

deps = wrapper.get_dependencies()

print("Standard library:", deps['stdlib'])
print("Third-party packages:", deps['third_party'])
print("Local imports:", deps['local'])

# Check for missing dependencies
if deps['missing']:
    print(f"Install missing packages: pip install {' '.join(deps['missing'])}")

Introspection

# Get function signature details
sig = wrapper.get_signature("execute")
print(sig)  # {'command': {'type': 'str', 'default': None}, ...}

# Get docstrings
doc = wrapper.get_doc("execute")  # Full docstring
summary = wrapper.get_doc_summary("execute")  # First line only

# Check if callable exists
if wrapper.has_callable("execute"):
    print("Function exists!")

# Get classes from module
cls = wrapper.get_class("MyClass")  # Get specific class
cls = wrapper.get_class(must_inherit=BaseClass)  # Get class by inheritance

Working with Classes

# Load and call class methods
wrapper.get_callable("MyClass.method_name")

# Get a class and instantiate it
MyClass = wrapper.get_class("MyClass")
instance = MyClass()

Utility Functions

Discover all modules in a directory:

from modwrap import list_modules, iter_modules

# Get all modules as a list
modules = list_modules("./my_modules")
for wrapper in modules:
    print(wrapper.name)

# Or iterate lazily (memory efficient)
for wrapper in iter_modules("./my_modules"):
    if wrapper.has_callable("main"):
        wrapper.get_callable("main")()