pretty-mod 0.2.1

A python module tree explorer for LLMs (and humans)

pretty-mod

a python module tree explorer for LLMs (and humans)

[!NOTE]

• For all versions >=0.1.0, wheels for different operating systems are built via maturin and published to PyPI. Install <0.1.0 for a pure Python version.
• Starting from v0.2.0, output includes colors by default. Use PRETTY_MOD_NO_COLOR=1 to disable.

# Explore module structure
» uvx pretty-mod tree json
📦 json
├── 📜 __all__: dump, dumps, load, loads, JSONDecoder, JSONDecodeError, JSONEncoder
├── ⚡ functions: dump, dumps, load, loads
├── 📦 decoder
│   ├── 📜 __all__: JSONDecoder, JSONDecodeError
│   └── 🔷 classes: JSONDecodeError, JSONDecoder
├── 📦 encoder
│   ├── 🔷 classes: JSONEncoder
│   └── ⚡ functions: py_encode_basestring, py_encode_basestring_ascii
├── 📦 scanner
│   └── 📜 __all__: make_scanner
└── 📦 tool
    └── ⚡ functions: main

# Inspect function signatures (even if the package is not installed)
» uv run pretty-mod sig fastmcp:FastMCP --quiet
📎 FastMCP
├──  Parameters:
├──  self
├──  name: str | None=None
├──  instructions: str | None=None
├──  auth: OAuthProvider | None=None
├──  lifespan: Callable[[FastMCP[LifespanResultT]], AbstractAsyncContextManager[LifespanResultT]] | None=None
├──  tool_serializer: Callable[[Any], str] | None=None
├──  cache_expiration_seconds: float | None=None
├──  on_duplicate_tools: DuplicateBehavior | None=None
├──  on_duplicate_resources: DuplicateBehavior | None=None
├──  on_duplicate_prompts: DuplicateBehavior | None=None
├──  resource_prefix_format: Literal['protocol', 'path'] | None=None
├──  mask_error_details: bool | None=None
├──  tools: list[Tool | Callable[..., Any]] | None=None
├──  dependencies: list[str] | None=None
├──  include_tags: set[str] | None=None
├──  exclude_tags: set[str] | None=None
├──  log_level: str | None=None
├──  debug: bool | None=None
├──  host: str | None=None
├──  port: int | None=None
├──  sse_path: str | None=None
├──  message_path: str | None=None
├──  streamable_http_path: str | None=None
├──  json_response: bool | None=None
└──  stateless_http: bool | None=None

installation

uv add pretty-mod

cli

pretty-mod includes a command-line interface for shell-based exploration:

[!IMPORTANT] all commands below can be run ephemerally with uvx, e.g. uvx pretty-mod tree json

# Explore module structure
pretty-mod tree json

# Go deeper into the tree with --depth
pretty-mod tree requests --depth 3

# Display function signatures  
pretty-mod sig json:loads

# Get JSON output for programmatic use
pretty-mod tree json -o json | jq '.tree.submodules | keys'
pretty-mod sig json:dumps -o json | jq '.parameters'
pretty-mod sig os.path:join

# Explore packages even without having them installed
pretty-mod tree django
pretty-mod tree flask --depth 1

# Use --quiet to suppress download messages
pretty-mod tree requests --quiet

# Version specifiers - explore specific versions
pretty-mod tree toml@0.10.2
pretty-mod sig toml@0.10.2:loads

# Submodules with version specifiers (correct syntax)
pretty-mod tree prefect.server@2.10.0  # ✅ Works
pretty-mod tree [e-mail]  # ❌ Invalid - version must come last

# Package name differs from module name
pretty-mod tree pydocket::docket       # PyPI package 'pydocket' contains module 'docket'
pretty-mod tree pillow::PIL            # PyPI package 'pillow' contains module 'PIL'
pretty-mod tree pillow::PIL@10.0.0    # Specific version of pillow
pretty-mod sig pillow::PIL.Image:open  # Works with signatures too

python sdk

from pretty_mod import display_tree

# Explore a module structure  
display_tree("collections", max_depth=2)

Example output

display_tree("collections", max_depth=2)

📦 collections
├── 📜 __all__: ChainMap, Counter, OrderedDict, UserDict, UserList, UserString, defaultdict, deque, namedtuple
├── 🔷 classes: ChainMap, Counter, OrderedDict, UserDict, UserList, UserString, defaultdict, deque
├── ⚡ functions: namedtuple
└── 📦 abc
    ├── 📜 __all__: Awaitable, Coroutine, AsyncIterable, AsyncIterator, AsyncGenerator, Hashable, Iterable, Iterator, Generator, Reversible, Sized, Container, Callable, Collection, Set, MutableSet, Mapping, MutableMapping, MappingView, KeysView, ItemsView, ValuesView, Sequence, MutableSequence, ByteString, Buffer
    └── 🔷 classes: AsyncGenerator, AsyncIterable, AsyncIterator, Awaitable, Buffer, ByteString, Callable, Collection, Container, Coroutine, Generator, Hashable, ItemsView, Iterable, Iterator, KeysView, Mapping, MappingView, MutableMapping, MutableSequence, MutableSet, Reversible, Sequence, Set, Sized, ValuesView

from pretty_mod import display_signature

# Display the signature of a callable (function, class constructor, etc.)
print(display_signature("json:loads"))

Example output

📎 loads
├── Parameters:
├── s
├── *
├── cls=None
├── object_hook=None
├── parse_float=None
├── parse_int=None
├── parse_constant=None
├── object_pairs_hook=None
└── **kw

customization

pretty-mod supports extensive customization through environment variables:

display characters

# Use ASCII-only mode for terminals without Unicode support
PRETTY_MOD_ASCII=1 pretty-mod tree json

# Customize individual icons
PRETTY_MOD_MODULE_ICON="[M]" pretty-mod tree json
PRETTY_MOD_FUNCTION_ICON="fn" pretty-mod tree json
PRETTY_MOD_CLASS_ICON="cls" pretty-mod tree json

colors

pretty-mod uses an earth-tone color scheme by default:

# Disable colors entirely
PRETTY_MOD_NO_COLOR=1 pretty-mod tree json
# or use the standard NO_COLOR environment variable
NO_COLOR=1 pretty-mod tree json

# Override specific colors with hex values
PRETTY_MOD_MODULE_COLOR="#FF6B6B" pretty-mod tree json
PRETTY_MOD_FUNCTION_COLOR="#4ECDC4" pretty-mod tree json

available color environment variables:

• PRETTY_MOD_MODULE_COLOR - Modules/packages (default: #8B7355)
• PRETTY_MOD_FUNCTION_COLOR - Functions (default: #6B8E23)
• PRETTY_MOD_CLASS_COLOR - Classes (default: #4682B4)
• PRETTY_MOD_CONSTANT_COLOR - Constants (default: #BC8F8F)
• PRETTY_MOD_EXPORTS_COLOR - all exports (default: #9370DB)
• PRETTY_MOD_SIGNATURE_COLOR - Signatures (default: #5F9EA0)
• PRETTY_MOD_TREE_COLOR - Tree structure lines (default: #696969)
• PRETTY_MOD_PARAM_COLOR - Parameter names (default: #708090)
• PRETTY_MOD_TYPE_COLOR - Type annotations (default: #778899)
• PRETTY_MOD_DEFAULT_COLOR - Default values (default: #8FBC8F)
• PRETTY_MOD_WARNING_COLOR - Warning messages (default: #DAA520)

examples

see the examples/ directory for more detailed usage patterns and advanced features.

development

gh repo clone zzstoatzz/pretty-mod && cd pretty-mod
just --list # see https://github.com/casey/just

Performance Testing

The performance test script (scripts/perf_test.py) supports both single-run exploration and proper benchmarking with multiple iterations:

# Run a proper benchmark with multiple iterations
./scripts/perf_test.py json --benchmark
./scripts/perf_test.py urllib --benchmark --runs 100 --warmup 10

# Compare performance between local and published versions
just compare-perf prefect 2

# Benchmark multiple modules
just benchmark-modules

# Or use shell timing for quick single-run comparisons
time ./scripts/perf_test.py numpy --depth 3
time uvx pretty-mod tree numpy --depth 3

Benchmark mode provides:

• Warmup runs to account for cold starts
• Multiple iterations for statistical significance
• Mean, standard deviation, min/max timing statistics
• Silent operation (no tree output) for accurate timing