code: def scalar(value):
      """Expression representing a scalar value.
  
      Parameters
      ----------
      value : bool, int, float or string
          Python value of the scalar. Note that only a subset of types are
          currently supported.
  
      Returns
      -------
      scalar_expr : Expression
          An Expression representing the scalar value
      """
      return Expression._scalar(value)
  
imports: from pyarrow._compute import Function, FunctionOptions, FunctionRegistry, HashAggregateFunction, HashAggregateKernel, Kernel, ScalarAggregateFunction, ScalarAggregateKernel, ScalarFunction, ScalarKernel, VectorFunction, VectorKernel, ArraySortOptions, AssumeTimezoneOptions, CastOptions, CountOptions, CumulativeOptions, CumulativeSumOptions, DayOfWeekOptions, DictionaryEncodeOptions, RunEndEncodeOptions, ElementWiseAggregateOptions, ExtractRegexOptions, FilterOptions, IndexOptions, JoinOptions, ListSliceOptions, MakeStructOptions, MapLookupOptions, MatchSubstringOptions, ModeOptions, NullOptions, PadOptions, PairwiseOptions, PartitionNthOptions, QuantileOptions, RandomOptions, RankOptions, ReplaceSliceOptions, ReplaceSubstringOptions, RoundBinaryOptions, RoundOptions, RoundTemporalOptions, RoundToMultipleOptions, ScalarAggregateOptions, SelectKOptions, SetLookupOptions, SliceOptions, SortOptions, SplitOptions, SplitPatternOptions, StrftimeOptions, StrptimeOptions, StructFieldOptions, TakeOptions, TDigestOptions, TrimOptions, Utf8NormalizeOptions, VarianceOptions, WeekOptions, call_function, function_registry, get_function, list_functions, call_tabular_function, register_scalar_function, register_tabular_function, register_aggregate_function, register_vector_function, UdfContext, Expression
  from collections import namedtuple
  import inspect
  from textwrap import dedent
  import warnings
  import pyarrow
  from pyarrow import _compute_docstrings
  from pyarrow.vendored import docscrape
label_desc: Use image node_id 18 for calling a global function with example usage: scalar(value) and returns: Expression