Neither DSN nor SERVER keyword supplied

Question

I am trying to connect to SQL database slightly different ways: with and without use of parameter. Why without use of parameters works fine, but with use of parameters - gives me an error. Did I make a syntax error? I went through each letters and couldn't see anything.

import pandas as pd
import pyodbc

#parameters:
server = 'SQLDEV'
db = 'MEJAMES'

#Create the connection
conn = pyodbc.connect('DRIVER={SQL Server};server =' + server + ';DATABASE = ' + db + ';Trusted_Connection=yes;')
# query db
sql = """

select top 10 PolicyNumber, QuoteID, ProducerName from tblQuotes

"""
df = pd.read_sql(sql,conn)
df

The statement above gives me an error

But if I do the same but without use of parameters then it works fine:

import pandas as pd
import pyodbc

#parameters:
#server = 'SQLDEV'
#db = 'MEJAMES'

#Create the connection
conn = pyodbc.connect("DRIVER={SQL Server};server=SQLDEV;database=MEJAMES;Trusted_Connection=yes;")
# query db
sql = """

select top 10 PolicyNumber, QuoteID, ProducerName from tblQuotes

"""
df = pd.read_sql(sql,conn)
df

Answer 1

The Windows ODBC Driver Manager is quite fussy about keywords in connection strings. They must be immediately followed by the equal sign, so SERVER=... will work, but SERVER =... will not.