try this : import java.sql as jsql import java.lang as lang driver, url, user, passwd = ( “oracle.jdbc.driver.OracleDriver”, “jdbc:oracle:thin:@localhost:1234:xxx1”, “sys as sysdba”, “xxx1”) lang.Class.forName(driver) c = jsql.DriverManager.getConnection(url,user,passwd)
The documentation for ipywidgets.Output has a section about interacting with output widgets from background threads. Using the Output.append_stdout method there is no need for locking. The final cell in this answer can then be replaced with: def t1_main(): for i in range(10): output1.append_stdout(f’thread1 {i}\n’) time.sleep(0.5) def t2_main(): for i in range(10): output2.append_stdout(f’thread2 {i}\n’) time.sleep(0.5) output1.clear_output() … Read more
Coming back here two years later, it seems to be not possible anymore to change the advanced properties in the connection settings. Instead you have to supply sys as sysdba as username. (This might seem obvious but took me a while to find this out)
So you have used Python’s “pre built in functions”, presumably like this: file_object = open(‘filename’) for something in file_object: some stuff here This reads the file by invoking an iterator on the file object which happens to return the next line from the file. You could instead use: file_object = open(‘filename’) lines = file_object.readlines() which … Read more
In python3, sys.maxint changed to sys.maxsize. Here are the values: Python2 >>> sys.maxint 9223372036854775807 Python3 >>> sys.maxsize 9223372036854775807 On the same platform, the values match. The value is typically 2**31 – 1 on a 32-bit platform and 2**63 – 1 on a 64-bit platform. Replacing your call to maxint with maxsize will stop this particular … Read more
For UNIX based systems (Linux, Mac): Hello, you can type : Ctrld Ctrld closes the standard input (stdin) by sending EOF. Example : >>> import sys >>> message = sys.stdin.readlines() Hello World My Name Is James Bond # <ctrl-d> EOF sent >>> print message [‘Hello\n’, ‘World\n’, ‘My\n’, ‘Name\n’, ‘Is\n’, ‘James\n’, ‘Bond\n’] For Windows : To … Read more
as a literal answer to the question ‘Python Import from parent directory‘: to import ‘mymodule’ that is in the parent directory of your current module: import os parentdir = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) os.sys.path.insert(0,parentdir) import mymodule edit Unfortunately, the __file__ attribute is not always set. A more secure way to get the parentdir is through the inspect module: … Read more
I think the best answer (in Python 3) is to use the errors= parameter: with open(‘evil_unicode.txt’, ‘r’, errors=”replace”) as f: lines = f.readlines() Proof: >>> s = b’\xe5abc\nline2\nline3′ >>> with open(‘evil_unicode.txt’,’wb’) as f: … f.write(s) … 16 >>> with open(‘evil_unicode.txt’, ‘r’) as f: … lines = f.readlines() … Traceback (most recent call last): File “<stdin>”, … Read more
UPDATE: see the EDIT below. I would use: import os os.environ[‘LD_LIBRARY_PATH’] = os.getcwd() # or whatever path you want This sets the LD_LIBRARY_PATH environment variable for the duration/lifetime of the execution of the current process only. EDIT: it looks like this needs to be set before starting Python: Changing LD_LIBRARY_PATH at runtime for ctypes So … Read more
Alright, since this appears to be more about what stack frames/call stacks are in general, let’s go through this: def f(): try: g() except: # WE WILL DO THINGS HERE def g(): h() def h(): raise Exception(‘stuff’) #CALL f() When we’re in h(), there are 4 frames on the call stack. [top level] [f()] [g()] … Read more