code: def test_parse_pip_requirements_with_constraints_files(tmp_path):
      con_file = tmp_path.joinpath("constraints.txt")
      con_file.write_text("b")
      assert _parse_pip_requirements(["a", f"-c {con_file}"]) == (
          ["a"],
          ["b"],
      )
  
      req_file = tmp_path.joinpath("requirements.txt")
      req_file.write_text(f"-c {con_file}\n")
      assert _parse_pip_requirements(["a", f"-r {req_file}"]) == (
          ["a"],
          ["b"],
      )
  
imports: import os
  import pytest
  import yaml
  from mlflow.exceptions import MlflowException
  from mlflow.utils.environment import _contains_mlflow_requirement, _deduplicate_requirements, _get_pip_deps, _get_pip_requirement_specifier, _is_mlflow_requirement, _is_pip_deps, _mlflow_conda_env, _overwrite_pip_deps, _parse_pip_requirements, _process_conda_env, _process_pip_requirements, _validate_env_arguments
  from tests.helper_functions import _mlflow_major_version_string
label_desc: Use image node_id 11 for calling a global function with example usage: test_parse_pip_requirements_with_constraints_files(tmp_path) without return types