import — Advanced Examples

Loads a module or package into the current namespace

Dynamic imports and importlib

Importing modules programmatically at runtime.

python

import importlib

# Import a module by name string
mod_name = "json"
mod = importlib.import_module(mod_name)
print(mod.dumps({"dynamic": True}))

# Reload a module
importlib.reload(mod)

# Check if a module is available
def is_available(name):
    try:
        importlib.import_module(name)
        return True
    except ImportError:
        return False

for pkg in ["json", "numpy", "nonexistent_pkg"]:
    print(f"{pkg}: {is_available(pkg)}")

importlib lets you import modules by string name, which is useful for plugin systems and optional dependencies.

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