fix propery name conversion

Author: altescy

src/openapi_python_generator/language_converters/python/common.py

@@ -55,3 +55,11 @@ def normalize_symbol(symbol: str) -> str:
     if normalized_symbol in keyword.kwlist:
         normalized_symbol = normalized_symbol + "_"
     return normalized_symbol
+
+
+def safe_property_name(name: str) -> str:
+    return re.sub(
+        r"^(\d.*)",
+        r"var_\1",
+        name.replace("@", "").replace("-", "_"),
+    )

src/openapi_python_generator/language_converters/python/jinja_config.py

@@ -19,7 +19,7 @@
 
 def create_jinja_env():
     custom_template_path = common.get_custom_template_path()
-    return Environment(
+    environment = Environment(
         loader=(
             ChoiceLoader(
                 [
@@ -33,3 +33,5 @@ def create_jinja_env():
         autoescape=True,
         trim_blocks=True,
     )
+    environment.filters["safe_property_name"] = common.safe_property_name
+    return environment

src/openapi_python_generator/language_converters/python/templates/models.jinja2

@@ -18,5 +18,5 @@ class {{ schema_name }}(BaseModel):
     """
     {% for property in properties %}
 
-    {{ property.name | replace("@","") | replace("-","_") }} : {{ property.type.converted_type | safe }} = Field(alias="{{ property.name }}" {% if not property.required %}, default = {{ property.default }} {% endif %})
+    {{ property.name | replace("@","") | replace("-","_") | replace("90d","var_90d") }} : {{ property.type.converted_type | safe }} = Field(alias="{{ property.name }}" {% if not property.required %}, default = {{ property.default }} {% endif %})
     {% endfor %}

src/openapi_python_generator/language_converters/python/templates/models_pydantic_2.jinja2

@@ -22,5 +22,5 @@ class {{ schema_name }}(BaseModel):
     }
     {% for property in properties %}
 
-    {{ property.name | replace("@","") | replace("-","_") }} : {{ property.type.converted_type | safe }} = Field(validation_alias="{{ property.name }}" {% if not property.required %}, default = {{ property.default }} {% endif %})
-    {% endfor %}
+    {{ property.name | safe_property_name }} : {{ property.type.converted_type | safe }} = Field(validation_alias="{{ property.name }}" {% if not property.required %}, default = {{ property.default }} {% endif %})
+    {% endfor %}