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However, if data is a DataFrame, then data['a'] returns all values in the column(s) named a. To avoid this ambiguity, Pandas supports the syntax data.loc['a'] as an alternative way to filter using the index. Pandas also supports the syntax data.iloc[n], which always takes an integer n and returns the nth value, counting from 0. This allows a ...
Spark Core is the foundation of the overall project. It provides distributed task dispatching, scheduling, and basic I/O functionalities, exposed through an application programming interface (for Java, Python, Scala, .NET [16] and R) centered on the RDD abstraction (the Java API is available for other JVM languages, but is also usable for some other non-JVM languages that can connect to the ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
AOL began in 1983, as a short-lived venture called Control Video Corporation (CVC), founded by William von Meister.Its sole product was an online service called GameLine for the Atari 2600 video game console, after von Meister's idea of buying music on demand was rejected by Warner Bros. [8] Subscribers bought a modem from the company for $49.95 and paid a one-time $15 setup fee.
The Pennsylvania Department of Conservation and Natural Resources (DCNR), established in 1995, is the agency in the U.S. state of Pennsylvania responsible for maintaining and preserving the state's 124 state parks and 20 state forests; providing information on the state's natural resources; and working with communities to benefit local recreation and natural areas. [1]
Erie Railroad's 1834 rail line plan An 1855 map of the New York and Erie Railroad. The New York and Erie Rail Road was chartered on April 24, 1832, by New York governor Enos T. Throop to connect the Hudson River at Piermont, north of New York City, west to Lake Erie at Dunkirk.
The PA-20 Pacer and PA-22 Tri-Pacer, Caribbean, and Colt are an American family of light strut-braced high-wing monoplane aircraft built by Piper Aircraft from 1949 to 1964. The Pacer is essentially a four-place version of the two-place PA-17 Vagabond , with conventional landing gear , a steel tube fuselage and an aluminum frame wing covered ...
Lean startup is a methodology for developing businesses and products that aims to shorten product development cycles and rapidly discover if a proposed business model is viable; this is achieved by adopting a combination of business-hypothesis-driven experimentation, iterative product releases, and validated learning.