try to import all python dependencies from the main script

lib/bitcoin.py

@@ -26,15 +26,8 @@ import hmac
 import version
 from util import print_error, InvalidPassword
 
-try:
-    import ecdsa
-except ImportError:
-    sys.exit("Error: python-ecdsa does not seem to be installed. Try 'sudo pip install ecdsa'")
-
-try:
-    import aes
-except ImportError:
-    sys.exit("Error: AES does not seem to be installed. Try 'sudo pip install slowaes'")
+import ecdsa
+import aes
 
 ################################## transactions
 
@@ -401,12 +394,7 @@ def is_private_key(key):
 
 ########### end pywallet functions #######################
 
-try:
-    from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
-except Exception:
-    print "cannot import ecdsa.curve_secp256k1. You probably need to upgrade ecdsa.\nTry: sudo pip install --upgrade ecdsa"
-    exit()
-
+from ecdsa.ecdsa import curve_secp256k1, generator_secp256k1
 from ecdsa.curves import SECP256k1
 from ecdsa.ellipticcurve import Point
 from ecdsa.util import string_to_number, number_to_string

lib/paymentrequest.py

@@ -27,19 +27,13 @@ import time
 import traceback
 import urllib2
 import urlparse
-
+import requests
 
 try:
     import paymentrequest_pb2
 except:
     sys.exit("Error: could not find paymentrequest_pb2.py. Create it with 'protoc --proto_path=lib/ --python_out=lib/ lib/paymentrequest.proto'")
 
-try:
-    import requests
-except ImportError:
-    sys.exit("Error: requests does not seem to be installed. Try 'sudo pip install requests'")
-
-
 import bitcoin
 import util
 import transaction

lib/x509.py

@@ -20,21 +20,9 @@
 from datetime import datetime
 import sys
 
-try:
-    import pyasn1
-except ImportError:
-    sys.exit("Error: pyasn1 does not seem to be installed. Try 'sudo pip install pyasn1'")
-
-try:
-    import pyasn1_modules
-except ImportError:
-    sys.exit("Error: pyasn1 does not seem to be installed. Try 'sudo pip install pyasn1-modules'")
-
-try:
-    import tlslite
-except ImportError:
-    sys.exit("Error: tlslite does not seem to be installed. Try 'sudo pip install tlslite'")
-
+import pyasn1
+import pyasn1_modules
+import tlslite
 
 # workaround https://github.com/trevp/tlslite/issues/15
 tlslite.utils.cryptomath.pycryptoLoaded = False