Add optional maximum Python version question

copier.yaml

@@ -99,6 +99,18 @@ python_version_minimum:
     - '3.13'
     - '3.14'
 
+python_version_maximum:
+  type: str
+  qmark: 🐍
+  help: Maximum Python version
+  default: No maximum
+  choices: |
+    - 'No maximum'
+    {%- set min_minor = python_version_minimum.split(".")[1] | int -%}
+    {%- for minor in range(min_minor, 15) %}
+    - '3.{{ minor }}'
+    {%- endfor %}
+
 enable_coverage:
   type: bool
   qmark: 📊

includes/python.jinja

@@ -1,11 +1,27 @@
 {%- set all_versions = ["3.10", "3.11", "3.12", "3.13", "3.14"] -%}
 {%- set min_minor = python_version_minimum.split(".")[1] | int -%}
+{%- set max_minor = (
+    python_version_maximum.split(".")[1] | int
+    if python_version_maximum != 'No maximum' else
+    (all_versions|last).split(".")[1] | int
+) -%}
 {%- macro for_each_version() -%}
-{%- for v in all_versions if v.split(".")[1] | int >= min_minor -%}
+{%- for v in all_versions if (
+    v.split(".")[1] | int >= min_minor and v.split(".")[1] | int <= max_minor
+) -%}
 {{ caller(loop, v) }}
 {%- endfor -%}
 {%- endmacro -%}
 
 {%- macro latest() -%}
-{{- all_versions|last -}}
+{%- for v in all_versions if v.split(".")[1] | int <= max_minor -%}
+{{ v if loop.last }}
+{%- endfor -%}
+{%- endmacro -%}
+
+{%- macro requires_python() -%}
+>={{ python_version_minimum }}
+{%- if python_version_maximum != 'No maximum' -%}
+,<3.{{ max_minor + 1 }}
+{%- endif %}
 {%- endmacro -%}

template/pyproject.toml.jinja

@@ -10,7 +10,7 @@ description = "{{ project_description }}"
 readme = "README.md"
 license = "{{ copyright_license }}"
 license-files = ["LICENSE"]
-requires-python = ">={{ python_version_minimum }}"
+requires-python = "{{ py.requires_python() }}"
 authors = [
     { name = "{{ user_name }}", email = "{{ user_email }}" },
 ]