Python: Added support for file_identifiers (#5123)

* Python: Added support for file_identifiers

* Added tests. Fixed file_identifier code.

* Python: Fixed excessive padding of file_identifier. Repaired tests.

* Python: Made code compatible with python2.7

* Python: Typo fix in @endcond

* whitespace normaalization

* Stylistic change from if(not X is None) to if(X is not None). Added comment to type string.

* Python: Added support for automatic code generation of file_identifiers. Added tests for said code generation.

* converted sprintf to snprintf

* Bugfix, added snprint deffinition for MSVC

* changed snprint deffinition for MSVC to sprint_s

* changed scanf to IntToStringHex. Renamed HasFileIdentifier to GenHasFileIdentifier.

* Added updated genereated code to commit

* Python bugix: flatc no longer produces HasFileIdentfier for shcemas with no file identifier

* Added tests to verify `MonsterBufferHasIdentifier` returns false on no Identifier

* Python: added tests for GetBufferIdentifier and BufferHasIdentifier
Python: removed unessasary parenethesis in if statements
Minor format changes.

* Python : correceted instances of keyword arguments being called as positional arguments

* fixed typos and grammer in comments

* Minor style fixes

* Indentation fix

* Equals style changes

* Python: Fixed Alignment Issues. Changed test code to test against atual output

* Ran make(forgot to run make last commit)

* Python: Style changes

* Style changes

* indentation and style

* readded CONTRIBUTING.md

* Formatting tweak

Mostly to make CI run again

* More formatting fixes

* More formatting fixes

* More formatting fixes

* More formatting fixes

* Formatting fix

* More formatting fixes

* Formatting

* ran generate_code.sh

6 files changed, 24 insertions, 0 deletions

diff --git a/tests/MyGame/Example/ArrayTable.py b/tests/MyGame/Example/ArrayTable.py
index 12eefd31..6d583f92 100644
--- a/tests/MyGame/Example/ArrayTable.py
+++ b/tests/MyGame/Example/ArrayTable.py
@@ -14,6 +14,10 @@ class ArrayTable(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def ArrayTableBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x41\x52\x52\x54", size_prefixed=size_prefixed)
+
     # ArrayTable
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
diff --git a/tests/MyGame/Example/Monster.py b/tests/MyGame/Example/Monster.py
index e83b9af4..5baf64d4 100644
--- a/tests/MyGame/Example/Monster.py
+++ b/tests/MyGame/Example/Monster.py
@@ -15,6 +15,10 @@ class Monster(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def MonsterBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x53", size_prefixed=size_prefixed)
+
     # Monster
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
diff --git a/tests/MyGame/Example/Referrable.py b/tests/MyGame/Example/Referrable.py
index 897b4ac4..eaec09bb 100644
--- a/tests/MyGame/Example/Referrable.py
+++ b/tests/MyGame/Example/Referrable.py
@@ -14,6 +14,10 @@ class Referrable(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def ReferrableBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x53", size_prefixed=size_prefixed)
+
     # Referrable
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
diff --git a/tests/MyGame/Example/Stat.py b/tests/MyGame/Example/Stat.py
index ae33aef3..0fbd2a7a 100644
--- a/tests/MyGame/Example/Stat.py
+++ b/tests/MyGame/Example/Stat.py
@@ -14,6 +14,10 @@ class Stat(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def StatBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x53", size_prefixed=size_prefixed)
+
     # Stat
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
diff --git a/tests/MyGame/Example/TestSimpleTableWithEnum.py b/tests/MyGame/Example/TestSimpleTableWithEnum.py
index 70a3c1d5..cb9c631a 100644
--- a/tests/MyGame/Example/TestSimpleTableWithEnum.py
+++ b/tests/MyGame/Example/TestSimpleTableWithEnum.py
@@ -14,6 +14,10 @@ class TestSimpleTableWithEnum(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def TestSimpleTableWithEnumBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x53", size_prefixed=size_prefixed)
+
     # TestSimpleTableWithEnum
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)
diff --git a/tests/MyGame/Example/TypeAliases.py b/tests/MyGame/Example/TypeAliases.py
index 707e53f1..81e9b064 100644
--- a/tests/MyGame/Example/TypeAliases.py
+++ b/tests/MyGame/Example/TypeAliases.py
@@ -14,6 +14,10 @@ class TypeAliases(object):
         x.Init(buf, n + offset)
         return x
 
+    @classmethod
+    def TypeAliasesBufferHasIdentifier(cls, buf, offset, size_prefixed=False):
+        return flatbuffers.util.BufferHasIdentifier(buf, offset, b"\x4D\x4F\x4E\x53", size_prefixed=size_prefixed)
+
     # TypeAliases
     def Init(self, buf, pos):
         self._tab = flatbuffers.table.Table(buf, pos)