Merge absolute imports into feature/abi

.flake8

@@ -24,4 +24,11 @@ per-file-ignores =
     pyteal/__init__.py:                             F401, F403
     pyteal/ir/ops.py:                               E221
     tests/module_test.py:                           F401, F403
+    tests/*.py:                                     I252
+    # Temporarily ignore until merge completes
+    pyteal/ast/abi/*.py:			    I252
+    # End temporarty ignore
+
+# from flake8-tidy-imports
+ban-relative-imports = true
 

CONTRIBUTING.md

@@ -2,33 +2,79 @@
 
 If you are interested in contributing to the project, we welcome and thank you. We want to make the best decentralized and effective blockchain platform available and we appreciate your willingness to help us.
 
-
-
-# Filing Issues
+## Filing Issues
 
 Did you discover a bug? Do you have a feature request? Filing issues is an easy way anyone can contribute and helps us improve PyTeal. We use GitHub Issues to track all known bugs and feature requests.
 
-Before logging an issue be sure to check current issues, check the [Developer Frequently Asked Questions](https://developer.algorand.org/docs/developer-faq) and [GitHub issues][issues_url] to see if your issue is described there.
+Before logging an issue be sure to check current issues, check the [open GitHub issues][issues_url] to see if your issue is described there.
 
 If you’d like to contribute to any of the repositories, please file a [GitHub issue][issues_url] using the issues menu item. Make sure to specify whether you are describing a bug or a new enhancement using the **Bug report** or **Feature request** button.
 
 See the GitHub help guide for more information on [filing an issue](https://help.github.com/en/articles/creating-an-issue).
 
-# Contribution Model
+## Contribution Model
 
-For each of our repositories we use the same model for contributing code. Developers wanting to contribute must create pull requests. This process is described in the GitHub [Creating a pull request from a fork](https://help.github.com/en/articles/creating-a-pull-request-from-a-fork) documentation. Each pull request should be initiated against the master branch in the Algorand repository.  After a pull request is submitted the core development team will review the submission and communicate with the developer using the comments sections of the PR. After the submission is reviewed and approved, it will be merged into the master branch of the source. These changes will be merged to our release branch on the next viable release date.
+For each of our repositories we use the same model for contributing code. Developers wanting to  contribute must create pull requests. This process is described in the GitHub [Creating a pull request from a fork](https://help.github.com/en/articles/creating-a-pull-request-from-a-fork) documentation. Each pull request should be initiated against the master branch in the Algorand repository.  After a pull request is submitted the core development team will review the submission and communicate with the developer using the comments sections of the PR. After the submission is reviewed and approved, it will be merged into the master branch of the source. These changes will be merged to our release branch on the next viable release date.
 
-# Code Guidelines
+## Code Guidelines
 
 We make a best-effort attempt to adhere to [PEP 8 - Style Guide for Python Code](https://www.python.org/dev/peps/pep-0008/).  Keep the following context in mind:
 * Our default stance is to run linter checks during the build process.
 * Notable exception:  [naming conventions](https://peps.python.org/pep-0008/#naming-conventions).
 
-## Naming Convention Guidelines
+### Naming Convention Guidelines
 Since PyTeal aims for backwards compatibility, it's _not_ straightforward to change naming conventions in public APIs.  Consequently, the repo contains some deviations from PEP 8 naming conventions.
 
 In order to retain a consistent style, we prefer to continue deviating from PEP 8 naming conventions in the following cases.  We try to balance minimizing exceptions against providing a consistent style for existing software.
 * Enums - Define with lowercase camelcase.  Example:  https://github.com/algorand/pyteal/blob/7c953f600113abcb9a31df68165b61a2c897f591/pyteal/ast/txn.py#L37
 * Factory methods - Define following [class name](https://peps.python.org/pep-0008/#class-names) conventions.  Example:  https://github.com/algorand/pyteal/blob/7c953f600113abcb9a31df68165b61a2c897f591/pyteal/ast/ternaryexpr.py#L63
 
 Since it's challenging to enforce these exceptions with a linter, we rely on PR creators and reviewers to make a best-effort attempt to enforce agreed upon naming conventions.
+
+### Module Guidelines
+
+Every directory containing source code should be a Python module, meaning it should have an `__init__.py` file. This `__init__.py` file is responsible for exporting all public objects (i.e. classes, functions, and constants) for use outside of that module.
+
+Modules may be created inside of other modules, in which case the deeper module is called a submodule or child module, and the module that contains it is called the parent module. For example, `pyteal` is the parent module to `pyteal.ast`.
+
+A sibling module is defined as a different child module of the parent module. For example, `pyteal.ast` and `pyteal.ir` are sibling modules.
+
+### Import Guidelines
+
+#### In Runtime Code
+
+A file in this codebase that requires another module/file in this codebase, should import the absolute path of the module/file, not the relative one, using the `from X import Y` method.
+
+With regard to modules, there are two ways to import an object from this codebase:
+
+* When importing an object from the same module or a parent module, you should import the full path of the source file that defines the object. For example:
+    * (Import from same module): If `pyteal/ast/seq.py` needs to import `Expr` defined in `pyteal/ast/expr.py`, it should use `from pyteal.ast.expr import Expr`. **DO NOT** use `from pyteal.ast import Expr` or `from pyteal import Expr`, as this will cause an unnecessary circular dependency.
+    * (Import from parent module): If `pyteal/ast/seq.py` needs to import `TealType` defined in `pyteal/types.py`, it should use `from pyteal.types import TealType`. **DO NOT** use `from pyteal import TealType`, as this will cause an unnecessary circular dependency.
+
+* When importing an object from a child module or sibling module, you should import the entire module folder and access the desired object from there. Do not directly import the file that defines the object. For example:
+    * (Import from child module): If `pyteal/compiler/compiler.py` needs to import `OptimizeOptions` from `pyteal/compiler/optimizer/optimizer.py`, it should use `from pyteal.compiler.optimizer import OptimizeOptions`. **DO NOT** use `from pyteal.compiler.optimizer.optimizer import OptimizeOptions`, as this will bypass the file `pyteal/compiler/optimizer/__init__.py`, which carefully defines the exports for the `pyteal.compiler.optimizer` module.
+    * (Import from sibling module): If `pyteal/compiler/compiler.py` needs to import `Expr` defined in `pyteal/ast/expr.py`, it should use `from pyteal.ast import Expr`. **DO NOT** use `from pyteal import Expr`, as this will cause an unnecessary circular dependency, nor `from pyteal.ast.expr import Expr`, as this will bypass the file `pyteal/ast/__init__.py`, which carefully defines the
+    exports for the `pyteal.ast` module.
+
+When this approach is followed properly, circular dependencies can happen in two ways:
+1. **Intra-module circular dependencies**, e.g. `m1/a.py` imports `m1/b.py` which imports `m1/a.py`. 
+   When this happens, normally one of the files only needs to import the other to implement something,
+   so the import statements can be moved from the top of the file to the body of the function that
+   needs them. This breaks the import cycle.
+
+2. **Inter-module circular dependencies**, e.g. `m1/a.py` imports module `m1/m2/__init__.py` which 
+   imports `m1/m2/x.py` which imports `m1/a.py`. To avoid this, make sure that any objects/files in
+   `m1` that need to be exposed to deeper modules do not rely on any objects from that deeper module.
+   If that isn’t possible, then perhaps `m1/a.py` belongs in the `m1/m2/` module.
+
+#### In Test Code
+
+Test code is typically any file that ends with `_test.py` or is in the top-level `tests` folder. In
+order to have a strong guarantee that we are testing in a similar environment to consumers of this
+library, test code is encouraged to import _only_ the top-level PyTeal module, either with
+`from pyteal import X, Y, Z` or `import pyteal as pt`.
+
+This way we can be sure all objects that should be publicly exported are in fact accessible from the top-level module.
+
+The only exception to this should be if the tests are for a non-exported object, in which case it is
+necessary to import the object according to the runtime rules in the previous section.

README.md

@@ -4,7 +4,7 @@
 
 # PyTeal: Algorand Smart Contracts in Python
 
-[![Build Status](https://travis-ci.com/algorand/pyteal.svg?branch=master)](https://travis-ci.com/algorand/pyteal)
+[![Build Status](https://github.com/algorand/pyteal/actions/workflows/build.yml/badge.svg)](https://github.com/algorand/pyteal/actions)
 [![PyPI version](https://badge.fury.io/py/pyteal.svg)](https://badge.fury.io/py/pyteal)
 [![Documentation Status](https://readthedocs.org/projects/pyteal/badge/?version=latest)](https://pyteal.readthedocs.io/en/latest/?badge=latest)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)

pyteal/__init__.py

@@ -1,18 +1,23 @@
-from .ast import *
-from .ast import __all__ as ast_all
-from .ir import *
-from .ir import __all__ as ir_all
-from .compiler import (
+from pyteal.ast import *
+from pyteal.ast import __all__ as ast_all
+from pyteal.ir import *
+from pyteal.ir import __all__ as ir_all
+from pyteal.compiler import (
     MAX_TEAL_VERSION,
     MIN_TEAL_VERSION,
     DEFAULT_TEAL_VERSION,
     CompileOptions,
     compileTeal,
     OptimizeOptions,
 )
-from .types import TealType
-from .errors import TealInternalError, TealTypeError, TealInputError, TealCompileError
-from .config import MAX_GROUP_SIZE, NUM_SLOTS
+from pyteal.types import TealType
+from pyteal.errors import (
+    TealInternalError,
+    TealTypeError,
+    TealInputError,
+    TealCompileError,
+)
+from pyteal.config import MAX_GROUP_SIZE, NUM_SLOTS
 
 # begin __all__
 __all__ = (

pyteal/__init__.pyi

@@ -1,21 +1,26 @@
 ## File generated from scripts/generate_init.py.
 ## DO NOT EDIT DIRECTLY
 
-from .ast import *
-from .ast import __all__ as ast_all
-from .ir import *
-from .ir import __all__ as ir_all
-from .compiler import (
+from pyteal.ast import *
+from pyteal.ast import __all__ as ast_all
+from pyteal.ir import *
+from pyteal.ir import __all__ as ir_all
+from pyteal.compiler import (
     MAX_TEAL_VERSION,
     MIN_TEAL_VERSION,
     DEFAULT_TEAL_VERSION,
     CompileOptions,
     compileTeal,
     OptimizeOptions,
 )
-from .types import TealType
-from .errors import TealInternalError, TealTypeError, TealInputError, TealCompileError
-from .config import MAX_GROUP_SIZE, NUM_SLOTS
+from pyteal.types import TealType
+from pyteal.errors import (
+    TealInternalError,
+    TealTypeError,
+    TealInputError,
+    TealCompileError,
+)
+from pyteal.config import MAX_GROUP_SIZE, NUM_SLOTS
 
 __all__ = [
     "AccountParam",

pyteal/ast/__init__.py

@@ -1,35 +1,43 @@
 # abstract types
-from .expr import Expr
+from pyteal.ast.expr import Expr
 
 # basic types
-from .leafexpr import LeafExpr
-from .addr import Addr
-from .bytes import Bytes
-from .int import Int, EnumInt
-from .methodsig import MethodSignature
+from pyteal.ast.leafexpr import LeafExpr
+from pyteal.ast.addr import Addr
+from pyteal.ast.bytes import Bytes
+from pyteal.ast.int import Int, EnumInt
+from pyteal.ast.methodsig import MethodSignature
 
 # properties
-from .arg import Arg
-from .txn import TxnType, TxnField, TxnExpr, TxnaExpr, TxnArray, TxnObject, Txn
-from .gtxn import GtxnExpr, GtxnaExpr, TxnGroup, Gtxn
-from .gaid import GeneratedID
-from .gitxn import Gitxn, GitxnExpr, GitxnaExpr, InnerTxnGroup
-from .gload import ImportScratchValue
-from .global_ import Global, GlobalField
-from .app import App, AppField, OnComplete, AppParam
-from .asset import AssetHolding, AssetParam
-from .acct import AccountParam
+from pyteal.ast.arg import Arg
+from pyteal.ast.txn import (
+    TxnType,
+    TxnField,
+    TxnExpr,
+    TxnaExpr,
+    TxnArray,
+    TxnObject,
+    Txn,
+)
+from pyteal.ast.gtxn import GtxnExpr, GtxnaExpr, TxnGroup, Gtxn
+from pyteal.ast.gaid import GeneratedID
+from pyteal.ast.gitxn import Gitxn, GitxnExpr, GitxnaExpr, InnerTxnGroup
+from pyteal.ast.gload import ImportScratchValue
+from pyteal.ast.global_ import Global, GlobalField
+from pyteal.ast.app import App, AppField, OnComplete, AppParam
+from pyteal.ast.asset import AssetHolding, AssetParam
+from pyteal.ast.acct import AccountParam
 
 # inner txns
-from .itxn import InnerTxnBuilder, InnerTxn, InnerTxnAction
+from pyteal.ast.itxn import InnerTxnBuilder, InnerTxn, InnerTxnAction
 
 # meta
-from .array import Array
-from .tmpl import Tmpl
-from .nonce import Nonce
+from pyteal.ast.array import Array
+from pyteal.ast.tmpl import Tmpl
+from pyteal.ast.nonce import Nonce
 
 # unary ops
-from .unaryexpr import (
+from pyteal.ast.unaryexpr import (
     UnaryExpr,
     Btoi,
     Itob,
@@ -51,7 +59,7 @@
 )
 
 # binary ops
-from .binaryexpr import (
+from pyteal.ast.binaryexpr import (
     BinaryExpr,
     Minus,
     Div,
@@ -90,47 +98,47 @@
 )
 
 # ternary ops
-from .ternaryexpr import Divw, Ed25519Verify, SetBit, SetByte
-from .substring import Substring, Extract, Suffix
+from pyteal.ast.ternaryexpr import Divw, Ed25519Verify, SetBit, SetByte
+from pyteal.ast.substring import Substring, Extract, Suffix
 
 # more ops
-from .naryexpr import NaryExpr, Add, Mul, And, Or, Concat
-from .widemath import WideRatio
+from pyteal.ast.naryexpr import NaryExpr, Add, Mul, And, Or, Concat
+from pyteal.ast.widemath import WideRatio
 
 # control flow
-from .if_ import If
-from .cond import Cond
-from .seq import Seq
-from .assert_ import Assert
-from .err import Err
-from .return_ import Return, Approve, Reject
-from .subroutine import (
+from pyteal.ast.if_ import If
+from pyteal.ast.cond import Cond
+from pyteal.ast.seq import Seq
+from pyteal.ast.assert_ import Assert
+from pyteal.ast.err import Err
+from pyteal.ast.return_ import Return, Approve, Reject
+from pyteal.ast.subroutine import (
     Subroutine,
     SubroutineDefinition,
     SubroutineDeclaration,
     SubroutineCall,
     SubroutineFnWrapper,
 )
-from .while_ import While
-from .for_ import For
-from .break_ import Break
-from .continue_ import Continue
+from pyteal.ast.while_ import While
+from pyteal.ast.for_ import For
+from pyteal.ast.break_ import Break
+from pyteal.ast.continue_ import Continue
 
 
 # misc
-from .scratch import (
+from pyteal.ast.scratch import (
     ScratchIndex,
     ScratchLoad,
     ScratchSlot,
     ScratchStackStore,
     ScratchStore,
 )
-from .scratchvar import DynamicScratchVar, ScratchVar
-from .maybe import MaybeValue
-from .multi import MultiValue
+from pyteal.ast.scratchvar import DynamicScratchVar, ScratchVar
+from pyteal.ast.maybe import MaybeValue
+from pyteal.ast.multi import MultiValue
 
 # abi
-from . import abi
+from pyteal.ast import abi
 
 __all__ = [
     "Expr",

pyteal/ast/acct.py

@@ -1,7 +1,7 @@
-from ..types import TealType, require_type
-from ..ir import Op
-from .expr import Expr
-from .maybe import MaybeValue
+from pyteal.types import TealType, require_type
+from pyteal.ir import Op
+from pyteal.ast.expr import Expr
+from pyteal.ast.maybe import MaybeValue
 
 
 class AccountParam:

pyteal/ast/addr.py

@@ -1,11 +1,11 @@
 from typing import TYPE_CHECKING
 
-from ..types import TealType, valid_address
-from ..ir import TealOp, Op, TealBlock
-from .leafexpr import LeafExpr
+from pyteal.types import TealType, valid_address
+from pyteal.ir import TealOp, Op, TealBlock
+from pyteal.ast.leafexpr import LeafExpr
 
 if TYPE_CHECKING:
-    from ..compiler import CompileOptions
+    from pyteal.compiler import CompileOptions
 
 
 class Addr(LeafExpr):

pyteal/ast/app.py

@@ -1,16 +1,16 @@
 from typing import TYPE_CHECKING
 from enum import Enum
 
-from ..types import TealType, require_type
-from ..ir import TealOp, Op, TealBlock
-from .leafexpr import LeafExpr
-from .expr import Expr
-from .maybe import MaybeValue
-from .int import EnumInt
-from .global_ import Global
+from pyteal.types import TealType, require_type
+from pyteal.ir import TealOp, Op, TealBlock
+from pyteal.ast.leafexpr import LeafExpr
+from pyteal.ast.expr import Expr
+from pyteal.ast.maybe import MaybeValue
+from pyteal.ast.int import EnumInt
+from pyteal.ast.global_ import Global
 
 if TYPE_CHECKING:
-    from ..compiler import CompileOptions
+    from pyteal.compiler import CompileOptions
 
 
 class OnComplete:

pyteal/ast/arg.py

@@ -1,13 +1,13 @@
 from typing import Union, cast, TYPE_CHECKING
 
-from ..types import TealType, require_type
-from ..ir import TealOp, Op, TealBlock
-from ..errors import TealInputError, verifyTealVersion
-from .expr import Expr
-from .leafexpr import LeafExpr
+from pyteal.types import TealType, require_type
+from pyteal.ir import TealOp, Op, TealBlock
+from pyteal.errors import TealInputError, verifyTealVersion
+from pyteal.ast.expr import Expr
+from pyteal.ast.leafexpr import LeafExpr
 
 if TYPE_CHECKING:
-    from ..compiler import CompileOptions
+    from pyteal.compiler import CompileOptions
 
 
 class Arg(LeafExpr):

pyteal/ast/array.py

@@ -1,6 +1,6 @@
 from abc import ABC, abstractmethod
 
-from .expr import Expr
+from pyteal.ast.expr import Expr
 
 
 class Array(ABC):