code: def has_valid_einsum_chars_only(einsum_str: str) -> bool:  # [x]
      """Check if ``einsum_str`` contains only valid characters for numpy einsum.
      **Examples:**
  
      ```python
      has_valid_einsum_chars_only("abAZ")
      #> True
  
      has_valid_einsum_chars_only("Över")
      #> False
      ```
      """
      return all(map(is_valid_einsum_char, einsum_str))
  
file_path: ivy/ivy/utils/einsum_parser.py
imports: import itertools
  from typing import Any, Dict, Iterator, List, Tuple, Union
  import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: has_valid_einsum_chars_only(einsum_str) and returns: all