email = """
2) From: Claire Fitz-Gerald 
   Date: 9/5/2014 9:52 AM
   Subject: NEFS 5 Available Fish
   All,
   NEFS 5 has the following fish available for lease/trade:
     GB EAST cod: 954 lbs @ $0.83
     GB EAST cod: 1,046 lbs to trade for 1,830 lbs GB WEST cod
     GB blackback: 30,000 lbs @ $0.07
     GOM blackback: 800 lbs @ $0.03
     white hake: 6,322 lbs @ $0.13
     pollock: 22,000 lbs @ $0.015
     redfish: 14,000 lbs @ $0.015
     GB yt: 1,873 lbs @ $1.13
     GB yt: 5,127 lbs to trade for 10,254 lbs SNE yt
"""
rx = re.compile('(\\d[\\d,]{2,}) lbs')
weights = rx.findall(email)
print(weights)
Разбор разных чисел с помощью RegEx