diff --git a/README.md b/README.md
index 1928df6..715af8a 100644
--- a/README.md
+++ b/README.md
@@ -83,8 +83,9 @@ print(gr)
 A common representation in Python is a pandas `DataFrame` for all tabular datasets. `DataFrame` must contain columns "seqnames", "starts", and "ends" to represent genomic intervals. Here's an example:
 
 ```python
-import genomicranges import GenomicRanges
+from genomicranges import GenomicRanges
 import pandas as pd
+from random import random
 
 df = pd.DataFrame(
     {
@@ -118,7 +119,7 @@ print(gr)
 `GenomicRanges` supports most [interval based operations](https://bioconductor.org/packages/release/bioc/html/GenomicRanges.html).
 
 ```python
-subject = genomicranges.from_ucsc(genome="hg38")
+subject = genomicranges.read_ucsc(genome="hg38")
 
 query = genomicranges.from_pandas(
     pd.DataFrame(
@@ -146,6 +147,10 @@ Just as it sounds, a `GenomicRangesList` is a named-list like object. If you are
 To construct a GenomicRangesList
 
 ```python
+from genomicranges import GenomicRanges, GenomicRangesList
+from iranges import IRanges
+from biocframe import BiocFrame
+
 gr1 = GenomicRanges(
     seqnames=["chr1", "chr2", "chr1", "chr3"],
     ranges=IRanges([1, 3, 2, 4], [10, 30, 50, 60]),
diff --git a/docs/tutorial.md b/docs/tutorial.md
index f5e8194..0eb28c0 100644
--- a/docs/tutorial.md
+++ b/docs/tutorial.md
@@ -81,6 +81,7 @@ gr = GenomicRanges(
 The package also provides a `SeqInfo` class to update or modify sequence information stored in the object. Read more about this class in [GenomeInfoDb package](https://bioconductor.org/packages/release/bioc/html/GenomeInfoDb.html).
 
 ```python
+from genomicranges import SeqInfo
 seq_obj = {
     "seqnames": ["chr1", "chr2", "chr3",],
     "seqlengths": range(100, 103),