[GitHub] [incubator-iceberg] TGooch44 opened a new pull request #426: [python] Adding a string to iceberg expression converter an tests

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TGooch44 opened a new pull request #426: [python] Adding a string to iceberg expression converter an tests
URL: https://github.com/apache/incubator-iceberg/pull/426
 
 
   This adds some static methods in api.expressions.Expressions for converting a sql-esque predicate clause into the equivalent iceberg expression. Eg:
   
   "col_a=1" becomes Expressions.equal("col_a", 1)
   "col_a=1 and col_b=2" becomes Expressions.and_(Expressions.equal("col_a", 1), Expressions.equal("col_b", 2)
   and so on.  The following is currently supported: =, ==, !=, <>, >, >=, <, <=, between, is null, is not null, not

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