title: it seems like that despite importing the right libs and modules, but still pycharm can not recognize the library
body: <pre><code>class Item(db.Model):
  id = db.Column(db.Integer, primary_key=True)
  name = db.Column(db.String(length=30), nullable=False, unique=True,) # create a Column object. db,Column takes an argument which shows the type of the Column, here we used db.String() method
  price = db.Column(db.Integer, nullable=False,)
  barcode = db.Column(db.String(length=12), nullable=False,Unique=True)
  desc = db.Column(db.String(length=5000), nullable=False)
  
  def __init__(self, **kwargs):
      self.name = kwargs.get('name')
      self.price = kwargs.get('price')
      self.barcode= kwargs.get('barcode')
      self.desc = kwargs.get('desc')
  </code></pre>
  <p>So I am trying to create a database using the SQLAlchemy module. for some reason, this does not work. I am a beginner and have tried to find a solution to the best of my ability but none of them actually solved my problem. I get the error below at the time of execution:</p>
  <pre><code>  File &quot;D:/program_files/PyCharm Community Edition 2020.3.3/WEB/market.py&quot;, line 33, in &lt;module&gt;
      class Item(db.Model):
    File &quot;D:/program_files/PyCharm Community Edition 2020.3.3/WEB/market.py&quot;, line 37, in Item
      barcode = db.Column(db.String(length=12), nullable=False,Unique=True)
    File &quot;D:\program_files\PyCharm Community Edition 2020.3.3\WEB\venv\lib\site-packages\sqlalchemy\sql\schema.py&quot;, line 1471, in __init__
      self._extra_kwargs(**kwargs)
    File &quot;D:\program_files\PyCharm Community Edition 2020.3.3\WEB\venv\lib\site-packages\sqlalchemy\sql\schema.py&quot;, line 1474, in _extra_kwargs
      self._validate_dialect_kwargs(kwargs)
    File &quot;D:\program_files\PyCharm Community Edition 2020.3.3\WEB\venv\lib\site-packages\sqlalchemy\sql\base.py&quot;, line 292, in _validate_dialect_kwargs
      &quot;named &lt;dialectname&gt;_&lt;argument&gt;, got '%s'&quot; % k
  TypeError: Additional arguments should be named &lt;dialectname&gt;_&lt;argument&gt;, got 'Unique'
  
  Process finished with exit code 1
  </code></pre>
  <p>any idea?
  Thanks</p>