text: """This file improves the homework3 tests to ensure that they are PEP8 compliant"""
  
  import pandas as pd
  
  LINK = "https://data.seattle.gov/api/views/tw7j-dfaw/rows.csv?accessType=DOWNLOAD"
  
  DF = pd.read_csv(LINK)
  
  """This test  all columns have values of the corect type"""
  def test_columns(types):
      """Check that the column names are the same type as rows"""
      assert list(DF.dtypes.values) == types
  
  """Check for nan values."""
  def test_nan():
      """checks whole DF for nan then compresses"""
      assert DF.isnan().any().any()
  
  """Verify that the dataframe has at least one row."""
  def test_row():
      """ensures that the number of rows is not 0"""
      value = DF.test_creat_dataframe([])
      assert value == 0
  