. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 993 i 3 API reference 1033 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1017 3 API reference 1019 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1018 3 API reference 1019 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

for the Python programming language. To the getting started guides To the user guide To the reference guide To the development guide CONTENTS 1 pandas: powerful Python data analysis toolkit, Release 505496 -1.868236 0.425610 c 4.657900 -2.486503 2.039647 d NaN -1.339437 3.231058 Here is a quick reference summary table of common functions. Each also takes an optional level parameter which applies only Passing a callable, as opposed to an actual value to be inserted, is useful when you don’t have a reference to the DataFrame at hand. This is common when using assign in a chain of operations. For example

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1026 3 API reference 1027 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1026 3 API reference 1027 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 975 3 API reference 977 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . information and explanation. To the user guide API reference The reference guide contains a detailed description of the pandas API. The reference describes how the methods work and which parameters can can be used. It assumes that you have an understanding of the key concepts. To the reference guide Developer guide Saw a typo in the documentation? Want to improve existing functionalities? The contributing

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 910 3 API reference 913 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . for the Python programming language. To the getting started guides To the user guide To the reference guide To the development guide CONTENTS 1 pandas: powerful Python data analysis toolkit, Release Tutorials For a quick overview of pandas functionality, see 10 Minutes to pandas. You can also reference the pandas cheat sheet for a succinct guide for manipulating data with pandas. The community produces

example data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 910 3 API reference 913 3.1 Input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . for the Python programming language. To the getting started guides To the user guide To the reference guide To the development guide CONTENTS 1 pandas: powerful Python data analysis toolkit, Release Tutorials For a quick overview of pandas functionality, see 10 Minutes to pandas. You can also reference the pandas cheat sheet for a succinct guide for manipulating data with pandas. The community produces

044340 -0.597130 0.395023 c 1.841608 0.327385 0.387933 d NaN 1.881078 -1.282898 Here is a quick reference summary table of common functions. Each also takes an optional level parameter which applies only Passing a callable, as opposed to an actual value to be inserted, is useful when you don’t have a reference to the DataFrame at hand. This is common when using assign in a chain of operations. For example filtering happens first, and then the ratio calculations. This is an example where we didn’t have a reference to the filtered DataFrame available. 3.4. Intro to Data Structures 175 pandas: powerful Python