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Figure index

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Answer 15

False. The output is shown in Figure 8 . The keys and the values were switched in the bottom panel of Figure 7 .

Figure 8 . Answer 15.
Get and display values b'Joe'b'39' b'333.444.5555'b'married' b'639'b'male' Get and display keysb'name' b'age'b'phone' b'marital'b'cubicle' b'gender'Attempt to pop and display two values b'333.444.5555'no weight Get and display keys and valuesDatabase length 5 (b'name', b'Joe')(b'age', b'39') (b'marital', b'married')(b'cubicle', b'639') (b'gender', b'male')Delete a key/value pair and display again Database length 4(b'name', b'Joe') (b'age', b'39')(b'marital', b'married') (b'gender', b'male')

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Answer 14


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Answer 13

False. The output is shown in Figure 5 . The in operator searches for a match in the keys and does not search for a match in the values .

Figure 5 . Answer 13.
Not in dumbDb

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Answer 12


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Answer 11

False. The code in Figure 1 produces an error by attempting to store a number as a value. The output (with some text deleted for brevity) is shown in Figure 2 .

Figure 2 . Answer 11.
Traceback (most recent call last): File "1359-1930-11.py", line 11, in<module>dumbDb[b'aNumber'] = 1234... raise TypeError("values must be bytes or strings")TypeError: values must be bytes or strings

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Answer 10

True. See The Python Standard Library - 12.5. dbm - Interfaces to Unix "databases" .

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Answer 9

True as of 11/09/2014.

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Answer 8

True. See comments in sample code at The Python Standard Library - 12.5. dbm - Interfaces to Unix "databases" .

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Answer 7

False. The object returned by dbm.open supports the same basic functionality as dictionaries . Keys and their corresponding values can be stored, retrieved, and deleted. The in operator and the keys method are available, as well as get and setdefault .

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Answer 6

False. The function named dbm.open can be called to open an existing dbm database file or to create a new dbm database file.

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Answer 5


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Answer 4

False. dbm is a generic interface to variants of the DBM databases - dbm.gnu or dbm.ndbm . If neither of these modules is installed, the slow-but-simple implementation in module dbm.dumb will be used.

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Answer 3

False. As of 11/09/2014, no such warning appears on the referenced webpage. Therefore, it might be concluded that even though shelve has features that are not available in dbm , dbm is the more secure of the two. As a result, this course will concentrate on dbm and ignore shelve .

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Answer 2

True as of 11/09/2014.

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Answer 1

True as of 11/09/2014.

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This section contains a variety of miscellaneous information.

Housekeeping material
  • Module name: Itse1359-1930-Dbm and Shelve Databases
  • File: Itse1359-1930.htm
  • Published: 11/10/14
  • Revised: 07/28/16

Financial : Although the Connexions site makes it possible for you to download aPDF file for this module at no charge, and also makes it possiblefor you to purchase a pre-printed version of the PDF file, you should be aware that some of the HTML elements in this module maynot translate well into PDF.

I also want you to know that, I receive no financial compensation from the Connexions website even if you purchase the PDF version ofthe module.

In the past, unknown individuals have copied my modules from cnx.org, converted them to Kindle books, and placed them for sale onAmazon.com showing me as the author. I neither receive compensation for those sales nor do I know who does receive compensation. If youpurchase such a book, please be aware that it is a copy of a module that is freely available on cnx.org and that it was made andpublished without my prior knowledge.

Affiliation : I am a professor of Computer Information Technology at Austin Community College in Austin, TX.


Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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