I am new to python and thought I would practice what I have been learning to complete a little task. Essentially I am inserting a cognimatic cameras data into a database from a .csv file that I pulled from the web. sadly I have had to omit all the connection details as it can only be accessed from my works computer which means the script cannot be run. To the problem! I have a for loop that iterates through the cameras in the system, running this script:
#!/usr/bin/python
import pymssql
import urllib2
import sys
import getpass
import csv
import os
attempts = 0 #connection attempt counter
#check db connection with tsql -H cabernet.ad.uow.edu.au -p 1433 -U ADUOW\\mbeavis -P mb1987 -D library_gate_counts
server = "*****" #sever address
#myUser = 'ADUOW\\' + raw_input("User: ")# User and password for server. Will this be needed when the script runs on the server? # Ask David
#passw = getpass.getpass("Password: ")
while attempts < 3: # attempt to connect 3 times
try: #try connection
conn = pymssql.connect(server = server, user = '****', password = '****', database = "***", port='1433',timeout = 15, login_timeout = 15)
break
except pymssql.Error as e: #if connection fails print error information
attempts += 1
print type(e)
print e.args
camCursor = conn.cursor() #creates a cursor on the database
camCursor.execute("SELECT * FROM dbo.CAMERAS") #Selects the camera names and connection details
for rows in camCursor:
print rows
Everything is fine and the loop runs as it should, however when I actually try and do anything with the data the loop runs once and ends, this is the full script:
#!/usr/bin/python
import pymssql
import urllib2
import sys
import getpass
import csv
import os
attempts = 0 #connection attempt counter
#check db connection with tsql -H cabernet.ad.uow.edu.au -p 1433 -U ADUOW\\mbeavis -P mb1987 -D library_gate_counts
server = "*****" #sever address
#myUser = 'ADUOW\\' + raw_input("User: ")# User and password for server. Will this be needed when the script runs on the server? # Ask David
#passw = getpass.getpass("Password: ")
while attempts < 3: # attempt to connect 3 times
try: #try connection
conn = pymssql.connect(server = server, user = '****', password = '****', database = "***", port='1433',timeout = 15, login_timeout = 15)
break
except pymssql.Error as e: #if connection fails print error information
attempts += 1
print type(e)
print e.args
camCursor = conn.cursor() #creates a cursor on the database
camCursor.execute("SELECT * FROM dbo.CAMERAS") #Selects the camera names and connection details
for rows in camCursor:
print rows
cameraName = str(rows[0]) #converts UNICODE camera name to string
connectionDetails = str(rows[1]) #converts UNICODE connection details to string
try: #try connection
#connect to webpage, this will be changed to loop through the entire range of cameras, which will
#have their names and connection details stored in a seperate database table
prefix = "***"
suffix = "**suffix"
response = urllib2.urlopen(prefix + connectionDetails + suffix, timeout = 5)
content = response.read() #read the data for the csv page into content
f = open( "/tmp/test.csv", 'w' ) #open a file for writing (test phase only)
f.write( content ) #write the data stored in content to file
f.close() #close file
print content #prints out content
with open( "/tmp/test.csv", 'rb' ) as csvFile: #opens the .csv file previously created
reader = csv.DictReader(csvFile) #reader object of DictReader, allows for the first row to be the dictionary keys for the following rows
for row in reader: #loop through each row
start = row['Interval start']
end = row['Interval stop']
camName = row['Counter name']
pplIn = int(row['Pedestrians coming in'])
pplOut = int(row['Pedestrians going out'])
insertCursor = conn.cursor()
insert = "INSERT INTO dbo.COUNTS VALUES (%s, %s, %d, %d)"
insertCursor.execute(insert, (camName, start, pplIn, pplOut))
conn.commit()
except urllib2.URLError as e: #catch URL errors
print type(e)
print e.args
except urllib2.HTTPError as e: #catch HTTP erros
print type(e)
print e.code
I have been scratching my head as I cannot see why there is a problem, but maybe I just need some fresh eyes on it. Any help would be great cheers!
Have you tried to do something like
queryResult = camCursor.execute("SELECT * FROM dbo.CAMERAS")
for rows in queryResult:
...
I guess this might solve the problem, which is probably the fact that you're trying to iterate over a cursor instead of the results.
You might find this way interesting as well:
camCursor.execute("SELECT * FROM dbo.CAMERAS")
for rows in camCursor.fetchall():
...
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