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app/.venv/Lib/site-packages/psycopg/_enums.py

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+"""
+Enum values for psycopg
+
+These values are defined by us and are not necessarily dependent on
+libpq-defined enums.
+"""
+
+# Copyright (C) 2020 The Psycopg Team
+
+from enum import Enum, IntEnum
+from selectors import EVENT_READ, EVENT_WRITE
+
+from . import pq
+
+
+class Wait(IntEnum):
+    R = EVENT_READ
+    W = EVENT_WRITE
+    RW = EVENT_READ | EVENT_WRITE
+
+
+class Ready(IntEnum):
+    NONE = 0
+    R = EVENT_READ
+    W = EVENT_WRITE
+    RW = EVENT_READ | EVENT_WRITE
+
+
+class PyFormat(str, Enum):
+    """
+    Enum representing the format wanted for a query argument.
+
+    The value `AUTO` allows psycopg to choose the best format for a certain
+    parameter.
+    """
+
+    __module__ = "psycopg.adapt"
+
+    AUTO = "s"
+    """Automatically chosen (``%s`` placeholder)."""
+    TEXT = "t"
+    """Text parameter (``%t`` placeholder)."""
+    BINARY = "b"
+    """Binary parameter (``%b`` placeholder)."""
+
+    @classmethod
+    def from_pq(cls, fmt: pq.Format) -> "PyFormat":
+        return _pg2py[fmt]
+
+    @classmethod
+    def as_pq(cls, fmt: "PyFormat") -> pq.Format:
+        return _py2pg[fmt]
+
+
+class IsolationLevel(IntEnum):
+    """
+    Enum representing the isolation level for a transaction.
+    """
+
+    __module__ = "psycopg"
+
+    READ_UNCOMMITTED = 1
+    """:sql:`READ UNCOMMITTED` isolation level."""
+    READ_COMMITTED = 2
+    """:sql:`READ COMMITTED` isolation level."""
+    REPEATABLE_READ = 3
+    """:sql:`REPEATABLE READ` isolation level."""
+    SERIALIZABLE = 4
+    """:sql:`SERIALIZABLE` isolation level."""
+
+
+_py2pg = {
+    PyFormat.TEXT: pq.Format.TEXT,
+    PyFormat.BINARY: pq.Format.BINARY,
+}
+
+_pg2py = {
+    pq.Format.TEXT: PyFormat.TEXT,
+    pq.Format.BINARY: PyFormat.BINARY,
+}